<?xml version="1.0" encoding="UTF-8"?>

<!--XBRL Document Created with the Workiva Platform-->
<!--Copyright 2026 Workiva-->
<!--r:019c0020-9661-7493-97c7-1066bb408488,g:9d9cd7c2-08b4-4cff-bbcc-4148cfc94e52-->
<link:linkbase xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd">
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/all" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#all"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#hypercube-dimension"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-default"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-domain"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/domain-member" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#domain-member"/>
  <link:roleRef roleURI="http://www.titanamerica.com/role/Cover" xlink:type="simple" xlink:href="ttam-20251231.xsd#Cover"/>
  <link:definitionLink xlink:role="http://www.titanamerica.com/role/Cover" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentInformationLineItems_019c0020-9a75-70f3-9585-ee37fe14bb78" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentInformationTable_019c0020-9a75-7731-9986-9ff4617df024" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_dei_DocumentInformationLineItems_019c0020-9a75-70f3-9585-ee37fe14bb78" xlink:to="loc_dei_DocumentInformationTable_019c0020-9a75-7731-9986-9ff4617df024" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressesAddressTypeAxis_019c0020-9a75-7bf7-85bc-9be3755492ea" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressesAddressTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_dei_DocumentInformationTable_019c0020-9a75-7731-9986-9ff4617df024" xlink:to="loc_dei_EntityAddressesAddressTypeAxis_019c0020-9a75-7bf7-85bc-9be3755492ea" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_AddressTypeDomain_019c0020-9a75-7bf7-85bc-9be3755492ea_default" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_AddressTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_EntityAddressesAddressTypeAxis_019c0020-9a75-7bf7-85bc-9be3755492ea" xlink:to="loc_dei_AddressTypeDomain_019c0020-9a75-7bf7-85bc-9be3755492ea_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_AddressTypeDomain_019c0020-9a75-79f8-8afb-abff65f75b5a" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_AddressTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_EntityAddressesAddressTypeAxis_019c0020-9a75-7bf7-85bc-9be3755492ea" xlink:to="loc_dei_AddressTypeDomain_019c0020-9a75-79f8-8afb-abff65f75b5a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_BusinessContactMember_019c0020-9a75-78d1-b63c-6ebffcd3350f" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_BusinessContactMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_AddressTypeDomain_019c0020-9a75-79f8-8afb-abff65f75b5a" xlink:to="loc_dei_BusinessContactMember_019c0020-9a75-78d1-b63c-6ebffcd3350f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentType_019c0020-9a75-7208-97cf-364616a35abd" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentType"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019c0020-9a75-70f3-9585-ee37fe14bb78" xlink:to="loc_dei_DocumentType_019c0020-9a75-7208-97cf-364616a35abd" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentRegistrationStatement_019c0020-9a75-7016-9fd5-5ca5ffdc530f" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentRegistrationStatement"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019c0020-9a75-70f3-9585-ee37fe14bb78" xlink:to="loc_dei_DocumentRegistrationStatement_019c0020-9a75-7016-9fd5-5ca5ffdc530f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentAnnualReport_019c0020-9a75-7393-a4fc-01592b05682b" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentAnnualReport"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019c0020-9a75-70f3-9585-ee37fe14bb78" xlink:to="loc_dei_DocumentAnnualReport_019c0020-9a75-7393-a4fc-01592b05682b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_CurrentFiscalYearEndDate_019c0020-9a75-7969-a3c2-bd59cdacf97d" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_CurrentFiscalYearEndDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019c0020-9a75-70f3-9585-ee37fe14bb78" xlink:to="loc_dei_CurrentFiscalYearEndDate_019c0020-9a75-7969-a3c2-bd59cdacf97d" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentPeriodEndDate_019c0020-9a75-7aa8-89f1-96190e9489c6" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentPeriodEndDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019c0020-9a75-70f3-9585-ee37fe14bb78" xlink:to="loc_dei_DocumentPeriodEndDate_019c0020-9a75-7aa8-89f1-96190e9489c6" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentTransitionReport_019c0020-9a75-7fe2-b77c-4b324f0834ed" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentTransitionReport"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019c0020-9a75-70f3-9585-ee37fe14bb78" xlink:to="loc_dei_DocumentTransitionReport_019c0020-9a75-7fe2-b77c-4b324f0834ed" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentShellCompanyReport_019c0020-9a75-7f8c-a401-762a211efbc8" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentShellCompanyReport"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019c0020-9a75-70f3-9585-ee37fe14bb78" xlink:to="loc_dei_DocumentShellCompanyReport_019c0020-9a75-7f8c-a401-762a211efbc8" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityFileNumber_019c0020-9a75-74b7-9977-536f36d8ebbc" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityFileNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019c0020-9a75-70f3-9585-ee37fe14bb78" xlink:to="loc_dei_EntityFileNumber_019c0020-9a75-74b7-9977-536f36d8ebbc" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityRegistrantName_019c0020-9a75-7c85-be75-2c7f8f3d43cd" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityRegistrantName"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019c0020-9a75-70f3-9585-ee37fe14bb78" xlink:to="loc_dei_EntityRegistrantName_019c0020-9a75-7c85-be75-2c7f8f3d43cd" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityIncorporationStateCountryCode_019c0020-9a75-7eae-9aa3-640a8e6081e9" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityIncorporationStateCountryCode"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019c0020-9a75-70f3-9585-ee37fe14bb78" xlink:to="loc_dei_EntityIncorporationStateCountryCode_019c0020-9a75-7eae-9aa3-640a8e6081e9" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressAddressLine1_019c0020-9a75-7706-9e43-ae9db054a7e3" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressAddressLine1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019c0020-9a75-70f3-9585-ee37fe14bb78" xlink:to="loc_dei_EntityAddressAddressLine1_019c0020-9a75-7706-9e43-ae9db054a7e3" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressCityOrTown_019c0020-9a75-71e8-b8d6-7dfe3fd7e026" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressCityOrTown"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019c0020-9a75-70f3-9585-ee37fe14bb78" xlink:to="loc_dei_EntityAddressCityOrTown_019c0020-9a75-71e8-b8d6-7dfe3fd7e026" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressCountry_019c0020-9a75-7b29-af46-577b7d01c1f0" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressCountry"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019c0020-9a75-70f3-9585-ee37fe14bb78" xlink:to="loc_dei_EntityAddressCountry_019c0020-9a75-7b29-af46-577b7d01c1f0" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_ContactPersonnelName_019c0020-9a75-7403-a631-d87711c5389b" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_ContactPersonnelName"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019c0020-9a75-70f3-9585-ee37fe14bb78" xlink:to="loc_dei_ContactPersonnelName_019c0020-9a75-7403-a631-d87711c5389b" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_CityAreaCode_019c0020-9a75-749c-8ee4-762f436d1b74" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_CityAreaCode"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019c0020-9a75-70f3-9585-ee37fe14bb78" xlink:to="loc_dei_CityAreaCode_019c0020-9a75-749c-8ee4-762f436d1b74" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LocalPhoneNumber_019c0020-9a75-7dea-9329-1328d9e4c31f" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LocalPhoneNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019c0020-9a75-70f3-9585-ee37fe14bb78" xlink:to="loc_dei_LocalPhoneNumber_019c0020-9a75-7dea-9329-1328d9e4c31f" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressAddressLine2_019c0020-9a75-7e34-b681-f9e176bb82dc" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressAddressLine2"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019c0020-9a75-70f3-9585-ee37fe14bb78" xlink:to="loc_dei_EntityAddressAddressLine2_019c0020-9a75-7e34-b681-f9e176bb82dc" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressPostalZipCode_019c0020-9a75-76ba-b5f7-ad46c6eab637" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressPostalZipCode"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019c0020-9a75-70f3-9585-ee37fe14bb78" xlink:to="loc_dei_EntityAddressPostalZipCode_019c0020-9a75-76ba-b5f7-ad46c6eab637" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_Security12bTitle_019c0020-9a75-74cf-badf-96cb4517e6ed" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_Security12bTitle"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019c0020-9a75-70f3-9585-ee37fe14bb78" xlink:to="loc_dei_Security12bTitle_019c0020-9a75-74cf-badf-96cb4517e6ed" xlink:type="arc" order="18"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_TradingSymbol_019c0020-9a75-77d5-a3ea-a1a4fab71671" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_TradingSymbol"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019c0020-9a75-70f3-9585-ee37fe14bb78" xlink:to="loc_dei_TradingSymbol_019c0020-9a75-77d5-a3ea-a1a4fab71671" xlink:type="arc" order="19"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_SecurityExchangeName_019c0020-9a75-7f1d-9a83-f082ed58e675" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_SecurityExchangeName"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019c0020-9a75-70f3-9585-ee37fe14bb78" xlink:to="loc_dei_SecurityExchangeName_019c0020-9a75-7f1d-9a83-f082ed58e675" xlink:type="arc" order="20"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCommonStockSharesOutstanding_019d19f5-cdc2-7c17-a3bd-f50d68aebba3" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityCommonStockSharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019c0020-9a75-70f3-9585-ee37fe14bb78" xlink:to="loc_dei_EntityCommonStockSharesOutstanding_019d19f5-cdc2-7c17-a3bd-f50d68aebba3" xlink:type="arc" order="21"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityWellKnownSeasonedIssuer_019c0020-9a75-7cd2-ae91-16f08ae90889" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityWellKnownSeasonedIssuer"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019c0020-9a75-70f3-9585-ee37fe14bb78" xlink:to="loc_dei_EntityWellKnownSeasonedIssuer_019c0020-9a75-7cd2-ae91-16f08ae90889" xlink:type="arc" order="22"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityVoluntaryFilers_019c0020-9a75-7a77-9610-1b1aa5aa6b63" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityVoluntaryFilers"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019c0020-9a75-70f3-9585-ee37fe14bb78" xlink:to="loc_dei_EntityVoluntaryFilers_019c0020-9a75-7a77-9610-1b1aa5aa6b63" xlink:type="arc" order="23"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCurrentReportingStatus_019c0020-9a75-7bc2-a2cc-708b1dd31e2d" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityCurrentReportingStatus"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019c0020-9a75-70f3-9585-ee37fe14bb78" xlink:to="loc_dei_EntityCurrentReportingStatus_019c0020-9a75-7bc2-a2cc-708b1dd31e2d" xlink:type="arc" order="24"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityInteractiveDataCurrent_019c0020-9a75-7105-9260-d27d297f947f" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityInteractiveDataCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019c0020-9a75-70f3-9585-ee37fe14bb78" xlink:to="loc_dei_EntityInteractiveDataCurrent_019c0020-9a75-7105-9260-d27d297f947f" xlink:type="arc" order="25"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityFilerCategory_019c0020-9a75-7755-a4ef-f537e52b7e4c" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityFilerCategory"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019c0020-9a75-70f3-9585-ee37fe14bb78" xlink:to="loc_dei_EntityFilerCategory_019c0020-9a75-7755-a4ef-f537e52b7e4c" xlink:type="arc" order="26"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityEmergingGrowthCompany_019c0020-9a75-74f1-9b86-3703883270bd" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityEmergingGrowthCompany"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019c0020-9a75-70f3-9585-ee37fe14bb78" xlink:to="loc_dei_EntityEmergingGrowthCompany_019c0020-9a75-74f1-9b86-3703883270bd" xlink:type="arc" order="27"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_IcfrAuditorAttestationFlag_019c0020-9a75-72e4-bfbc-fc65a7c041c9" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_IcfrAuditorAttestationFlag"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019c0020-9a75-70f3-9585-ee37fe14bb78" xlink:to="loc_dei_IcfrAuditorAttestationFlag_019c0020-9a75-72e4-bfbc-fc65a7c041c9" xlink:type="arc" order="28"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentFinStmtErrorCorrectionFlag_019c0020-9a75-70ad-8df1-b48c2e352b1c" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentFinStmtErrorCorrectionFlag"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019c0020-9a75-70f3-9585-ee37fe14bb78" xlink:to="loc_dei_DocumentFinStmtErrorCorrectionFlag_019c0020-9a75-70ad-8df1-b48c2e352b1c" xlink:type="arc" order="29"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentAccountingStandard_019c0020-9a75-70b9-89f1-8baa62a33efa" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentAccountingStandard"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019c0020-9a75-70f3-9585-ee37fe14bb78" xlink:to="loc_dei_DocumentAccountingStandard_019c0020-9a75-70b9-89f1-8baa62a33efa" xlink:type="arc" order="30"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityShellCompany_019cc447-ef89-7903-ab59-c388385835c7" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityShellCompany"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019c0020-9a75-70f3-9585-ee37fe14bb78" xlink:to="loc_dei_EntityShellCompany_019cc447-ef89-7903-ab59-c388385835c7" xlink:type="arc" order="31"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_AmendmentFlag_019c0020-9a75-7e5e-b706-61501a347b98" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_AmendmentFlag"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019c0020-9a75-70f3-9585-ee37fe14bb78" xlink:to="loc_dei_AmendmentFlag_019c0020-9a75-7e5e-b706-61501a347b98" xlink:type="arc" order="32"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentFiscalYearFocus_019c0020-9a75-76f9-b843-604646d35dcf" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentFiscalYearFocus"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019c0020-9a75-70f3-9585-ee37fe14bb78" xlink:to="loc_dei_DocumentFiscalYearFocus_019c0020-9a75-76f9-b843-604646d35dcf" xlink:type="arc" order="33"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentFiscalPeriodFocus_019c0020-9a75-7c52-b16b-8dccc17aa94a" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentFiscalPeriodFocus"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019c0020-9a75-70f3-9585-ee37fe14bb78" xlink:to="loc_dei_DocumentFiscalPeriodFocus_019c0020-9a75-7c52-b16b-8dccc17aa94a" xlink:type="arc" order="34"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCentralIndexKey_019c0020-9a75-79de-99a4-f92a398c7c26" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityCentralIndexKey"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019c0020-9a75-70f3-9585-ee37fe14bb78" xlink:to="loc_dei_EntityCentralIndexKey_019c0020-9a75-79de-99a4-f92a398c7c26" xlink:type="arc" order="35"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.titanamerica.com/role/ConsolidatedStatementsofChangesinStockholdersEquity" xlink:type="simple" xlink:href="ttam-20251231.xsd#ConsolidatedStatementsofChangesinStockholdersEquity"/>
  <link:definitionLink xlink:role="http://www.titanamerica.com/role/ConsolidatedStatementsofChangesinStockholdersEquity" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_StatementOfChangesInEquityLineItems_019c0020-9b5d-73bd-a401-9df72bf2463d" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_StatementOfChangesInEquityLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_StatementOfChangesInEquityTable_019c0020-9b5d-7b92-be71-7b817212b104" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_StatementOfChangesInEquityTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_StatementOfChangesInEquityLineItems_019c0020-9b5d-73bd-a401-9df72bf2463d" xlink:to="loc_ifrs-full_StatementOfChangesInEquityTable_019c0020-9b5d-7b92-be71-7b817212b104" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ComponentsOfEquityAxis_019c0020-9b5d-7821-92b6-08dd749754c9" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ComponentsOfEquityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_StatementOfChangesInEquityTable_019c0020-9b5d-7b92-be71-7b817212b104" xlink:to="loc_ifrs-full_ComponentsOfEquityAxis_019c0020-9b5d-7821-92b6-08dd749754c9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ComponentsOfEquityDomain_019c0020-9b5d-7821-92b6-08dd749754c9_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ComponentsOfEquityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_ComponentsOfEquityAxis_019c0020-9b5d-7821-92b6-08dd749754c9" xlink:to="loc_ifrs-full_ComponentsOfEquityDomain_019c0020-9b5d-7821-92b6-08dd749754c9_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ComponentsOfEquityDomain_019c0020-9b5d-7522-83a5-1d32ab868f55" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ComponentsOfEquityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_ComponentsOfEquityAxis_019c0020-9b5d-7821-92b6-08dd749754c9" xlink:to="loc_ifrs-full_ComponentsOfEquityDomain_019c0020-9b5d-7522-83a5-1d32ab868f55" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_IssuedCapitalMember_019c0020-9b5d-7df3-a8ff-09025af7a6f0" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_IssuedCapitalMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ComponentsOfEquityDomain_019c0020-9b5d-7522-83a5-1d32ab868f55" xlink:to="loc_ifrs-full_IssuedCapitalMember_019c0020-9b5d-7df3-a8ff-09025af7a6f0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_SharePremiumMember_019c0020-9b5d-733b-b9b4-c9d7bcf305c3" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_SharePremiumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ComponentsOfEquityDomain_019c0020-9b5d-7522-83a5-1d32ab868f55" xlink:to="loc_ifrs-full_SharePremiumMember_019c0020-9b5d-733b-b9b4-c9d7bcf305c3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CapitalReserveMember_019c0020-9b5d-7a19-9873-fbb17df6ebb8" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CapitalReserveMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ComponentsOfEquityDomain_019c0020-9b5d-7522-83a5-1d32ab868f55" xlink:to="loc_ifrs-full_CapitalReserveMember_019c0020-9b5d-7a19-9873-fbb17df6ebb8" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RetainedEarningsMember_019c0020-9b5d-7e8e-830a-85214e8d1998" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_RetainedEarningsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ComponentsOfEquityDomain_019c0020-9b5d-7522-83a5-1d32ab868f55" xlink:to="loc_ifrs-full_RetainedEarningsMember_019c0020-9b5d-7e8e-830a-85214e8d1998" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CapitalRedemptionReserveMember_019c0020-9b5d-7137-97b9-60fff0ea9e2d" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CapitalRedemptionReserveMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ComponentsOfEquityDomain_019c0020-9b5d-7522-83a5-1d32ab868f55" xlink:to="loc_ifrs-full_CapitalRedemptionReserveMember_019c0020-9b5d-7137-97b9-60fff0ea9e2d" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AccumulatedOtherComprehensiveIncomeMember_019c0020-9b5d-7d66-8951-95e4400df9ea" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_AccumulatedOtherComprehensiveIncomeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ComponentsOfEquityDomain_019c0020-9b5d-7522-83a5-1d32ab868f55" xlink:to="loc_ifrs-full_AccumulatedOtherComprehensiveIncomeMember_019c0020-9b5d-7d66-8951-95e4400df9ea" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_Equity_019c0020-9b5d-7452-b180-23d627d886fe" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_Equity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_StatementOfChangesInEquityLineItems_019c0020-9b5d-73bd-a401-9df72bf2463d" xlink:to="loc_ifrs-full_Equity_019c0020-9b5d-7452-b180-23d627d886fe" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ProfitLoss_019c0020-9b5d-7860-b9fb-4ad5148b2fb4" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ProfitLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_StatementOfChangesInEquityLineItems_019c0020-9b5d-73bd-a401-9df72bf2463d" xlink:to="loc_ifrs-full_ProfitLoss_019c0020-9b5d-7860-b9fb-4ad5148b2fb4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_IncreaseDecreaseOfCapitalReserve_019c0020-9b5d-784d-884b-4568913852a4" xlink:href="ttam-20251231.xsd#ttam_IncreaseDecreaseOfCapitalReserve"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_StatementOfChangesInEquityLineItems_019c0020-9b5d-73bd-a401-9df72bf2463d" xlink:to="loc_ttam_IncreaseDecreaseOfCapitalReserve_019c0020-9b5d-784d-884b-4568913852a4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DividendsPaid_019c0020-9b5d-7d4e-a9e9-8607b8563024" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DividendsPaid"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_StatementOfChangesInEquityLineItems_019c0020-9b5d-73bd-a401-9df72bf2463d" xlink:to="loc_ifrs-full_DividendsPaid_019c0020-9b5d-7d4e-a9e9-8607b8563024" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_DistributionOfSharePremium_019c7f11-e245-71f7-b95e-b801d2d1e9a4" xlink:href="ttam-20251231.xsd#ttam_DistributionOfSharePremium"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_StatementOfChangesInEquityLineItems_019c0020-9b5d-73bd-a401-9df72bf2463d" xlink:to="loc_ttam_DistributionOfSharePremium_019c7f11-e245-71f7-b95e-b801d2d1e9a4" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ReductionOfIssuedCapital_019c0020-9b5d-77e9-ad07-86a76a1c3f8b" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ReductionOfIssuedCapital"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_StatementOfChangesInEquityLineItems_019c0020-9b5d-73bd-a401-9df72bf2463d" xlink:to="loc_ifrs-full_ReductionOfIssuedCapital_019c0020-9b5d-77e9-ad07-86a76a1c3f8b" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_CapitalIncreaseExpenses_019c0020-9b5d-7e77-860f-eed0b1ce308f" xlink:href="ttam-20251231.xsd#ttam_CapitalIncreaseExpenses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_StatementOfChangesInEquityLineItems_019c0020-9b5d-73bd-a401-9df72bf2463d" xlink:to="loc_ttam_CapitalIncreaseExpenses_019c0020-9b5d-7e77-860f-eed0b1ce308f" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_OtherComprehensiveIncomeNetOfTaxDefinedBenefitPlans_019c0020-9b5d-7e2a-b2bf-94cc1273e952" xlink:href="ttam-20251231.xsd#ttam_OtherComprehensiveIncomeNetOfTaxDefinedBenefitPlans"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_StatementOfChangesInEquityLineItems_019c0020-9b5d-73bd-a401-9df72bf2463d" xlink:to="loc_ttam_OtherComprehensiveIncomeNetOfTaxDefinedBenefitPlans_019c0020-9b5d-7e2a-b2bf-94cc1273e952" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_OtherComprehensiveIncomeNetOfTaxCashFlowHedges_019c0020-9b5d-7b31-a635-9ace82780ce6" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_OtherComprehensiveIncomeNetOfTaxCashFlowHedges"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_StatementOfChangesInEquityLineItems_019c0020-9b5d-73bd-a401-9df72bf2463d" xlink:to="loc_ifrs-full_OtherComprehensiveIncomeNetOfTaxCashFlowHedges_019c0020-9b5d-7b31-a635-9ace82780ce6" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_IncreaseDecreaseThroughSharebasedPaymentTransactions_019c0020-9b5d-7c91-be16-a105eb955707" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_IncreaseDecreaseThroughSharebasedPaymentTransactions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_StatementOfChangesInEquityLineItems_019c0020-9b5d-73bd-a401-9df72bf2463d" xlink:to="loc_ifrs-full_IncreaseDecreaseThroughSharebasedPaymentTransactions_019c0020-9b5d-7c91-be16-a105eb955707" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_IncreaseDecreaseToRelatedPartyRechargeForShareBasedPaymentTransactions_019c0020-9b5d-78ec-9b51-784d9a5ff231" xlink:href="ttam-20251231.xsd#ttam_IncreaseDecreaseToRelatedPartyRechargeForShareBasedPaymentTransactions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_StatementOfChangesInEquityLineItems_019c0020-9b5d-73bd-a401-9df72bf2463d" xlink:to="loc_ttam_IncreaseDecreaseToRelatedPartyRechargeForShareBasedPaymentTransactions_019c0020-9b5d-78ec-9b51-784d9a5ff231" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_IncreaseDecreaseInShareBasedPaymentTransactionsExcessTaxBenefit_019c0020-9b5d-7113-bba5-51129aa1a1f2" xlink:href="ttam-20251231.xsd#ttam_IncreaseDecreaseInShareBasedPaymentTransactionsExcessTaxBenefit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_StatementOfChangesInEquityLineItems_019c0020-9b5d-73bd-a401-9df72bf2463d" xlink:to="loc_ttam_IncreaseDecreaseInShareBasedPaymentTransactionsExcessTaxBenefit_019c0020-9b5d-7113-bba5-51129aa1a1f2" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_OtherComprehensiveIncomeNetOfTaxExchangeDifferencesOnTranslation_019c0020-9b5d-7af4-b0c0-f2f4e9f119a4" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_OtherComprehensiveIncomeNetOfTaxExchangeDifferencesOnTranslation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_StatementOfChangesInEquityLineItems_019c0020-9b5d-73bd-a401-9df72bf2463d" xlink:to="loc_ifrs-full_OtherComprehensiveIncomeNetOfTaxExchangeDifferencesOnTranslation_019c0020-9b5d-7af4-b0c0-f2f4e9f119a4" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_IncreaseDecreaseThroughTransactionsWithRelatedPartyEquity_019c0020-9b5d-7bb6-9501-67bee2176fc5" xlink:href="ttam-20251231.xsd#ttam_IncreaseDecreaseThroughTransactionsWithRelatedPartyEquity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_StatementOfChangesInEquityLineItems_019c0020-9b5d-73bd-a401-9df72bf2463d" xlink:to="loc_ttam_IncreaseDecreaseThroughTransactionsWithRelatedPartyEquity_019c0020-9b5d-7bb6-9501-67bee2176fc5" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_IssueOfEquity_019c7f16-b9b3-7bbb-a45d-26f4b1178fd4" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_IssueOfEquity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_StatementOfChangesInEquityLineItems_019c0020-9b5d-73bd-a401-9df72bf2463d" xlink:to="loc_ifrs-full_IssueOfEquity_019c7f16-b9b3-7bbb-a45d-26f4b1178fd4" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_Equity_019c0020-9b5d-7fd9-bc31-946eacf360b3" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_Equity"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.titanamerica.com/role/GeneralinformationandsummaryofmaterialaccountingpoliciesNarrativeDetails" xlink:type="simple" xlink:href="ttam-20251231.xsd#GeneralinformationandsummaryofmaterialaccountingpoliciesNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.titanamerica.com/role/GeneralinformationandsummaryofmaterialaccountingpoliciesNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_019c0020-9b5d-7e97-9ea4-e932a6988e78" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfClassesOfShareCapitalLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfClassesOfShareCapitalTable_019c0020-9b5d-7c14-812e-84f4a9352e5f" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfClassesOfShareCapitalTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_019c0020-9b5d-7e97-9ea4-e932a6988e78" xlink:to="loc_ifrs-full_DisclosureOfClassesOfShareCapitalTable_019c0020-9b5d-7c14-812e-84f4a9352e5f" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfShareCapitalAxis_019c0020-9b5d-772d-9abb-a976d17da497" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfShareCapitalAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalTable_019c0020-9b5d-7c14-812e-84f4a9352e5f" xlink:to="loc_ifrs-full_ClassesOfShareCapitalAxis_019c0020-9b5d-772d-9abb-a976d17da497" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfShareCapitalDomain_019c0020-9b5d-772d-9abb-a976d17da497_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfShareCapitalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_ClassesOfShareCapitalAxis_019c0020-9b5d-772d-9abb-a976d17da497" xlink:to="loc_ifrs-full_ClassesOfShareCapitalDomain_019c0020-9b5d-772d-9abb-a976d17da497_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfShareCapitalDomain_019c0020-9b5d-7779-b014-e47287437733" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfShareCapitalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_ClassesOfShareCapitalAxis_019c0020-9b5d-772d-9abb-a976d17da497" xlink:to="loc_ifrs-full_ClassesOfShareCapitalDomain_019c0020-9b5d-7779-b014-e47287437733" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_OrdinarySharesTitanAmericaSAMember_019c0020-9b5d-7dff-8d5d-d8095c52be6a" xlink:href="ttam-20251231.xsd#ttam_OrdinarySharesTitanAmericaSAMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfShareCapitalDomain_019c0020-9b5d-7779-b014-e47287437733" xlink:to="loc_ttam_OrdinarySharesTitanAmericaSAMember_019c0020-9b5d-7dff-8d5d-d8095c52be6a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_SignificantInvestmentsInSubsidiariesAxis_019c0020-9b5d-747d-b2c5-c16b74cf98c7" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_SignificantInvestmentsInSubsidiariesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalTable_019c0020-9b5d-7c14-812e-84f4a9352e5f" xlink:to="loc_ifrs-full_SignificantInvestmentsInSubsidiariesAxis_019c0020-9b5d-747d-b2c5-c16b74cf98c7" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_SignificantInvestmentsInSubsidiariesDomain_019c0020-9b5d-747d-b2c5-c16b74cf98c7_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_SignificantInvestmentsInSubsidiariesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_SignificantInvestmentsInSubsidiariesAxis_019c0020-9b5d-747d-b2c5-c16b74cf98c7" xlink:to="loc_ifrs-full_SignificantInvestmentsInSubsidiariesDomain_019c0020-9b5d-747d-b2c5-c16b74cf98c7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_SignificantInvestmentsInSubsidiariesDomain_019c0020-9b5d-75e4-9fb4-c28a66360c1f" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_SignificantInvestmentsInSubsidiariesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_SignificantInvestmentsInSubsidiariesAxis_019c0020-9b5d-747d-b2c5-c16b74cf98c7" xlink:to="loc_ifrs-full_SignificantInvestmentsInSubsidiariesDomain_019c0020-9b5d-75e4-9fb4-c28a66360c1f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_TitanAmericaLLCMember_019c0020-9b5d-71c6-9f0b-96314e691b1b" xlink:href="ttam-20251231.xsd#ttam_TitanAmericaLLCMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_SignificantInvestmentsInSubsidiariesDomain_019c0020-9b5d-75e4-9fb4-c28a66360c1f" xlink:to="loc_ttam_TitanAmericaLLCMember_019c0020-9b5d-71c6-9f0b-96314e691b1b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfAssetsAxis_019c0020-9b5d-7d9d-9d7b-22216a884de1" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfAssetsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalTable_019c0020-9b5d-7c14-812e-84f4a9352e5f" xlink:to="loc_ifrs-full_ClassesOfAssetsAxis_019c0020-9b5d-7d9d-9d7b-22216a884de1" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfAssetsDomain_019c0020-9b5d-7d9d-9d7b-22216a884de1_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfAssetsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_ClassesOfAssetsAxis_019c0020-9b5d-7d9d-9d7b-22216a884de1" xlink:to="loc_ifrs-full_ClassesOfAssetsDomain_019c0020-9b5d-7d9d-9d7b-22216a884de1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfAssetsDomain_019c0020-9b5d-7955-a067-dc2c41cb7d27" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfAssetsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_ClassesOfAssetsAxis_019c0020-9b5d-7d9d-9d7b-22216a884de1" xlink:to="loc_ifrs-full_ClassesOfAssetsDomain_019c0020-9b5d-7955-a067-dc2c41cb7d27" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_MachineryEquipmentAndMotorVehiclesMember_019c0020-9b5d-78f1-ad93-c50c50ee47b7" xlink:href="ttam-20251231.xsd#ttam_MachineryEquipmentAndMotorVehiclesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfAssetsDomain_019c0020-9b5d-7955-a067-dc2c41cb7d27" xlink:to="loc_ttam_MachineryEquipmentAndMotorVehiclesMember_019c0020-9b5d-78f1-ad93-c50c50ee47b7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LandAndBuildingsMember_019c0020-9b5d-7989-aafc-af41c58c1f50" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_LandAndBuildingsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfAssetsDomain_019c0020-9b5d-7955-a067-dc2c41cb7d27" xlink:to="loc_ifrs-full_LandAndBuildingsMember_019c0020-9b5d-7989-aafc-af41c58c1f50" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_ShortTermEquipmentVehiclesAndLowValueAssetsMember_019c0020-9b5d-797a-a26d-ffb5b130b651" xlink:href="ttam-20251231.xsd#ttam_ShortTermEquipmentVehiclesAndLowValueAssetsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfAssetsDomain_019c0020-9b5d-7955-a067-dc2c41cb7d27" xlink:to="loc_ttam_ShortTermEquipmentVehiclesAndLowValueAssetsMember_019c0020-9b5d-797a-a26d-ffb5b130b651" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RangeAxis_019c0020-9b5d-7766-af6d-6980e1d32759" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalTable_019c0020-9b5d-7c14-812e-84f4a9352e5f" xlink:to="loc_ifrs-full_RangeAxis_019c0020-9b5d-7766-af6d-6980e1d32759" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RangeDomain_019c0020-9b5d-7766-af6d-6980e1d32759_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_RangeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_RangeAxis_019c0020-9b5d-7766-af6d-6980e1d32759" xlink:to="loc_ifrs-full_RangeDomain_019c0020-9b5d-7766-af6d-6980e1d32759_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RangeDomain_019c0020-9b5d-7c28-a4d0-0f2d0498a1fc" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_RangeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_RangeAxis_019c0020-9b5d-7766-af6d-6980e1d32759" xlink:to="loc_ifrs-full_RangeDomain_019c0020-9b5d-7c28-a4d0-0f2d0498a1fc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BottomOfRangeMember_019c0020-9b5d-73d4-844f-29dd00e84cf0" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BottomOfRangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_RangeDomain_019c0020-9b5d-7c28-a4d0-0f2d0498a1fc" xlink:to="loc_ifrs-full_BottomOfRangeMember_019c0020-9b5d-73d4-844f-29dd00e84cf0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TopOfRangeMember_019c0020-9b5d-7819-aca9-2945b340296c" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TopOfRangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_RangeDomain_019c0020-9b5d-7c28-a4d0-0f2d0498a1fc" xlink:to="loc_ifrs-full_TopOfRangeMember_019c0020-9b5d-7819-aca9-2945b340296c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TypesOfSharebasedPaymentArrangementsAxis_019c0020-9b5d-785f-a1f1-da83862ddef4" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TypesOfSharebasedPaymentArrangementsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalTable_019c0020-9b5d-7c14-812e-84f4a9352e5f" xlink:to="loc_ifrs-full_TypesOfSharebasedPaymentArrangementsAxis_019c0020-9b5d-785f-a1f1-da83862ddef4" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TypesOfSharebasedPaymentArrangementsDomain_019c0020-9b5d-785f-a1f1-da83862ddef4_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TypesOfSharebasedPaymentArrangementsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_TypesOfSharebasedPaymentArrangementsAxis_019c0020-9b5d-785f-a1f1-da83862ddef4" xlink:to="loc_ifrs-full_TypesOfSharebasedPaymentArrangementsDomain_019c0020-9b5d-785f-a1f1-da83862ddef4_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TypesOfSharebasedPaymentArrangementsDomain_019c0020-9b5d-703a-a46d-c455b3fced2b" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TypesOfSharebasedPaymentArrangementsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_TypesOfSharebasedPaymentArrangementsAxis_019c0020-9b5d-785f-a1f1-da83862ddef4" xlink:to="loc_ifrs-full_TypesOfSharebasedPaymentArrangementsDomain_019c0020-9b5d-703a-a46d-c455b3fced2b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_TCIShadowSharesMember_019c0020-9b5d-7ce5-a85b-42e575aa9e57" xlink:href="ttam-20251231.xsd#ttam_TCIShadowSharesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_TypesOfSharebasedPaymentArrangementsDomain_019c0020-9b5d-703a-a46d-c455b3fced2b" xlink:to="loc_ttam_TCIShadowSharesMember_019c0020-9b5d-7ce5-a85b-42e575aa9e57" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_NumberOfSharesIssuedAndFullyPaidReorganization_019c0020-9b5d-7fe5-9ef7-957082166b68" xlink:href="ttam-20251231.xsd#ttam_NumberOfSharesIssuedAndFullyPaidReorganization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_019c0020-9b5d-7e97-9ea4-e932a6988e78" xlink:to="loc_ttam_NumberOfSharesIssuedAndFullyPaidReorganization_019c0020-9b5d-7fe5-9ef7-957082166b68" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ProportionOfOwnershipInterestInSubsidiary_019c0020-9b5d-7647-9199-35000cbc97a0" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ProportionOfOwnershipInterestInSubsidiary"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_019c0020-9b5d-7e97-9ea4-e932a6988e78" xlink:to="loc_ifrs-full_ProportionOfOwnershipInterestInSubsidiary_019c0020-9b5d-7647-9199-35000cbc97a0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_DerivedValuePerShare_019c0020-9b5d-70e8-9752-f2085b0d18f6" xlink:href="ttam-20251231.xsd#ttam_DerivedValuePerShare"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_019c0020-9b5d-7e97-9ea4-e932a6988e78" xlink:to="loc_ttam_DerivedValuePerShare_019c0020-9b5d-70e8-9752-f2085b0d18f6" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_LeaseTerm_019c0020-9b5d-746c-98c2-2a10ac8a0e3b" xlink:href="ttam-20251231.xsd#ttam_LeaseTerm"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_019c0020-9b5d-7e97-9ea4-e932a6988e78" xlink:to="loc_ttam_LeaseTerm_019c0020-9b5d-746c-98c2-2a10ac8a0e3b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_ProvisionsExpectedRateOfInflation_019c0020-9b5d-741a-ae5c-3fb964b51455" xlink:href="ttam-20251231.xsd#ttam_ProvisionsExpectedRateOfInflation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_019c0020-9b5d-7e97-9ea4-e932a6988e78" xlink:to="loc_ttam_ProvisionsExpectedRateOfInflation_019c0020-9b5d-741a-ae5c-3fb964b51455" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.titanamerica.com/role/GeneralinformationandsummaryofmaterialaccountingpoliciesSubsidiaryInformationDetails" xlink:type="simple" xlink:href="ttam-20251231.xsd#GeneralinformationandsummaryofmaterialaccountingpoliciesSubsidiaryInformationDetails"/>
  <link:definitionLink xlink:role="http://www.titanamerica.com/role/GeneralinformationandsummaryofmaterialaccountingpoliciesSubsidiaryInformationDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfSignificantInvestmentsInSubsidiariesLineItems_019c0020-9b5d-75a0-8880-a80c99217892" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfSignificantInvestmentsInSubsidiariesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfSignificantInvestmentsInSubsidiariesTable_019c0020-9b5d-72ca-a65f-58de5b3739b3" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfSignificantInvestmentsInSubsidiariesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfSignificantInvestmentsInSubsidiariesLineItems_019c0020-9b5d-75a0-8880-a80c99217892" xlink:to="loc_ifrs-full_DisclosureOfSignificantInvestmentsInSubsidiariesTable_019c0020-9b5d-72ca-a65f-58de5b3739b3" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_SignificantInvestmentsInSubsidiariesAxis_019c0020-9b5d-7f9f-afdd-7d0b4209975a" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_SignificantInvestmentsInSubsidiariesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfSignificantInvestmentsInSubsidiariesTable_019c0020-9b5d-72ca-a65f-58de5b3739b3" xlink:to="loc_ifrs-full_SignificantInvestmentsInSubsidiariesAxis_019c0020-9b5d-7f9f-afdd-7d0b4209975a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_SignificantInvestmentsInSubsidiariesDomain_019c0020-9b5d-7f9f-afdd-7d0b4209975a_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_SignificantInvestmentsInSubsidiariesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_SignificantInvestmentsInSubsidiariesAxis_019c0020-9b5d-7f9f-afdd-7d0b4209975a" xlink:to="loc_ifrs-full_SignificantInvestmentsInSubsidiariesDomain_019c0020-9b5d-7f9f-afdd-7d0b4209975a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_SignificantInvestmentsInSubsidiariesDomain_019c0020-9b5d-7fc2-92ce-787f3b0f25b5" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_SignificantInvestmentsInSubsidiariesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_SignificantInvestmentsInSubsidiariesAxis_019c0020-9b5d-7f9f-afdd-7d0b4209975a" xlink:to="loc_ifrs-full_SignificantInvestmentsInSubsidiariesDomain_019c0020-9b5d-7fc2-92ce-787f3b0f25b5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_TitanCementAtlanticSingleMemberIndustrialAndCommercialS.A.Member_019c0020-9b5d-7789-8f6e-e0f629164865" xlink:href="ttam-20251231.xsd#ttam_TitanCementAtlanticSingleMemberIndustrialAndCommercialS.A.Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_SignificantInvestmentsInSubsidiariesDomain_019c0020-9b5d-7fc2-92ce-787f3b0f25b5" xlink:to="loc_ttam_TitanCementAtlanticSingleMemberIndustrialAndCommercialS.A.Member_019c0020-9b5d-7789-8f6e-e0f629164865" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_TitanAmericaLLCMember_019c0020-9b5d-74a6-aeaf-67004b4f5270" xlink:href="ttam-20251231.xsd#ttam_TitanAmericaLLCMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_SignificantInvestmentsInSubsidiariesDomain_019c0020-9b5d-7fc2-92ce-787f3b0f25b5" xlink:to="loc_ttam_TitanAmericaLLCMember_019c0020-9b5d-74a6-aeaf-67004b4f5270" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_EssexCementCompanyLLCMember_019c0020-9b5d-78e9-8399-9674171344dc" xlink:href="ttam-20251231.xsd#ttam_EssexCementCompanyLLCMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_SignificantInvestmentsInSubsidiariesDomain_019c0020-9b5d-7fc2-92ce-787f3b0f25b5" xlink:to="loc_ttam_EssexCementCompanyLLCMember_019c0020-9b5d-78e9-8399-9674171344dc" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_MechanicsvilleConcreteLLCMember_019c0020-9b5d-7835-9581-d3741e29c959" xlink:href="ttam-20251231.xsd#ttam_MechanicsvilleConcreteLLCMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_SignificantInvestmentsInSubsidiariesDomain_019c0020-9b5d-7fc2-92ce-787f3b0f25b5" xlink:to="loc_ttam_MechanicsvilleConcreteLLCMember_019c0020-9b5d-7835-9581-d3741e29c959" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_PennsucoCementCompanyLLCMember_019c0020-9b5d-73a9-86bf-b66e6d151b41" xlink:href="ttam-20251231.xsd#ttam_PennsucoCementCompanyLLCMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_SignificantInvestmentsInSubsidiariesDomain_019c0020-9b5d-7fc2-92ce-787f3b0f25b5" xlink:to="loc_ttam_PennsucoCementCompanyLLCMember_019c0020-9b5d-73a9-86bf-b66e6d151b41" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_RoanokeCementCompanyLLCMember_019c0020-9b5d-7b55-a705-3c465d3556ff" xlink:href="ttam-20251231.xsd#ttam_RoanokeCementCompanyLLCMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_SignificantInvestmentsInSubsidiariesDomain_019c0020-9b5d-7fc2-92ce-787f3b0f25b5" xlink:to="loc_ttam_RoanokeCementCompanyLLCMember_019c0020-9b5d-7b55-a705-3c465d3556ff" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_SWReadyMixConcreteCompanyLLCMember_019c0020-9b5d-7966-98fe-b3e205e4c656" xlink:href="ttam-20251231.xsd#ttam_SWReadyMixConcreteCompanyLLCMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_SignificantInvestmentsInSubsidiariesDomain_019c0020-9b5d-7fc2-92ce-787f3b0f25b5" xlink:to="loc_ttam_SWReadyMixConcreteCompanyLLCMember_019c0020-9b5d-7966-98fe-b3e205e4c656" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_SeparationTechnologiesLLCMember_019c0020-9b5d-7615-b3ed-235fd2e4766e" xlink:href="ttam-20251231.xsd#ttam_SeparationTechnologiesLLCMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_SignificantInvestmentsInSubsidiariesDomain_019c0020-9b5d-7fc2-92ce-787f3b0f25b5" xlink:to="loc_ttam_SeparationTechnologiesLLCMember_019c0020-9b5d-7615-b3ed-235fd2e4766e" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_STEquipmentTechnologyLLCMember_019cf656-e549-79e1-a48e-ba1370e08cc1" xlink:href="ttam-20251231.xsd#ttam_STEquipmentTechnologyLLCMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_SignificantInvestmentsInSubsidiariesDomain_019c0020-9b5d-7fc2-92ce-787f3b0f25b5" xlink:to="loc_ttam_STEquipmentTechnologyLLCMember_019cf656-e549-79e1-a48e-ba1370e08cc1" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_STEquipmentTechnologyTradingCompanyLLCMember_019cf657-1f07-75a9-84b6-c553512b4f90" xlink:href="ttam-20251231.xsd#ttam_STEquipmentTechnologyTradingCompanyLLCMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_SignificantInvestmentsInSubsidiariesDomain_019c0020-9b5d-7fc2-92ce-787f3b0f25b5" xlink:to="loc_ttam_STEquipmentTechnologyTradingCompanyLLCMember_019cf657-1f07-75a9-84b6-c553512b4f90" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_TitanFloridaLLCMember_019c0020-9b5d-7f00-9766-25b22157b1a2" xlink:href="ttam-20251231.xsd#ttam_TitanFloridaLLCMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_SignificantInvestmentsInSubsidiariesDomain_019c0020-9b5d-7fc2-92ce-787f3b0f25b5" xlink:to="loc_ttam_TitanFloridaLLCMember_019c0020-9b5d-7f00-9766-25b22157b1a2" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_TitanMidAtlanticAggregatesLLCMember_019c0020-9b5d-73e0-889c-ae726efb0ddf" xlink:href="ttam-20251231.xsd#ttam_TitanMidAtlanticAggregatesLLCMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_SignificantInvestmentsInSubsidiariesDomain_019c0020-9b5d-7fc2-92ce-787f3b0f25b5" xlink:to="loc_ttam_TitanMidAtlanticAggregatesLLCMember_019c0020-9b5d-73e0-889c-ae726efb0ddf" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_TitanVirginiaReadyMixMember_019c0020-9b5d-7f28-8b80-ea7793a54695" xlink:href="ttam-20251231.xsd#ttam_TitanVirginiaReadyMixMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_SignificantInvestmentsInSubsidiariesDomain_019c0020-9b5d-7fc2-92ce-787f3b0f25b5" xlink:to="loc_ttam_TitanVirginiaReadyMixMember_019c0020-9b5d-7f28-8b80-ea7793a54695" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_TrusaRealtyLLCMember_019c0020-9b5d-76fb-b897-7b0cff465d02" xlink:href="ttam-20251231.xsd#ttam_TrusaRealtyLLCMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_SignificantInvestmentsInSubsidiariesDomain_019c0020-9b5d-7fc2-92ce-787f3b0f25b5" xlink:to="loc_ttam_TrusaRealtyLLCMember_019c0020-9b5d-76fb-b897-7b0cff465d02" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_TitanFloridaHoldingsLLCMember_019c0020-9b5d-78bb-add9-ea54f6eb9c7c" xlink:href="ttam-20251231.xsd#ttam_TitanFloridaHoldingsLLCMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_SignificantInvestmentsInSubsidiariesDomain_019c0020-9b5d-7fc2-92ce-787f3b0f25b5" xlink:to="loc_ttam_TitanFloridaHoldingsLLCMember_019c0020-9b5d-78bb-add9-ea54f6eb9c7c" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_MarkfieldAmericaLLCMember_019d0493-7af9-7f0a-81e9-2f34d060e4d2" xlink:href="ttam-20251231.xsd#ttam_MarkfieldAmericaLLCMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_SignificantInvestmentsInSubsidiariesDomain_019c0020-9b5d-7fc2-92ce-787f3b0f25b5" xlink:to="loc_ttam_MarkfieldAmericaLLCMember_019d0493-7af9-7f0a-81e9-2f34d060e4d2" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_CarolinasCementCompanyLLCMember_019c0020-9b5d-744c-9202-fb0a88cc3563" xlink:href="ttam-20251231.xsd#ttam_CarolinasCementCompanyLLCMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_SignificantInvestmentsInSubsidiariesDomain_019c0020-9b5d-7fc2-92ce-787f3b0f25b5" xlink:to="loc_ttam_CarolinasCementCompanyLLCMember_019c0020-9b5d-744c-9202-fb0a88cc3563" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_NorfapeakeTerminalLLCMember_019c0020-9b5d-7d78-b92b-f85fee27ab3d" xlink:href="ttam-20251231.xsd#ttam_NorfapeakeTerminalLLCMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_SignificantInvestmentsInSubsidiariesDomain_019c0020-9b5d-7fc2-92ce-787f3b0f25b5" xlink:to="loc_ttam_NorfapeakeTerminalLLCMember_019c0020-9b5d-7d78-b92b-f85fee27ab3d" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_SWReadyMixLLCMember_019c0020-9b5d-7c09-8fc4-9221f68134df" xlink:href="ttam-20251231.xsd#ttam_SWReadyMixLLCMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_SignificantInvestmentsInSubsidiariesDomain_019c0020-9b5d-7fc2-92ce-787f3b0f25b5" xlink:to="loc_ttam_SWReadyMixLLCMember_019c0020-9b5d-7c09-8fc4-9221f68134df" xlink:type="arc" order="18"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_TitanFloridaConcreteProductsLLCMember_019c0020-9b5d-72a9-a5ff-5328970ac3c6" xlink:href="ttam-20251231.xsd#ttam_TitanFloridaConcreteProductsLLCMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_SignificantInvestmentsInSubsidiariesDomain_019c0020-9b5d-7fc2-92ce-787f3b0f25b5" xlink:to="loc_ttam_TitanFloridaConcreteProductsLLCMember_019c0020-9b5d-72a9-a5ff-5328970ac3c6" xlink:type="arc" order="19"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_TitanFloridaAggregatesLLCMember_019c0020-9b5d-7b6f-ae97-e0ba5d7fdea5" xlink:href="ttam-20251231.xsd#ttam_TitanFloridaAggregatesLLCMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_SignificantInvestmentsInSubsidiariesDomain_019c0020-9b5d-7fc2-92ce-787f3b0f25b5" xlink:to="loc_ttam_TitanFloridaAggregatesLLCMember_019c0020-9b5d-7b6f-ae97-e0ba5d7fdea5" xlink:type="arc" order="20"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_TitanFloridaCementLLCMember_019c0020-9b5d-79f0-800f-c9de325e8b43" xlink:href="ttam-20251231.xsd#ttam_TitanFloridaCementLLCMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_SignificantInvestmentsInSubsidiariesDomain_019c0020-9b5d-7fc2-92ce-787f3b0f25b5" xlink:to="loc_ttam_TitanFloridaCementLLCMember_019c0020-9b5d-79f0-800f-c9de325e8b43" xlink:type="arc" order="21"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_MetroRediMixLLCMember_019c0020-9b5d-7604-bedf-537ab45e6e37" xlink:href="ttam-20251231.xsd#ttam_MetroRediMixLLCMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_SignificantInvestmentsInSubsidiariesDomain_019c0020-9b5d-7fc2-92ce-787f3b0f25b5" xlink:to="loc_ttam_MetroRediMixLLCMember_019c0020-9b5d-7604-bedf-537ab45e6e37" xlink:type="arc" order="22"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_MiamiValleyReadyMixFloridaLLCMember_019c0020-9b5d-7c97-ac72-971eba07687a" xlink:href="ttam-20251231.xsd#ttam_MiamiValleyReadyMixFloridaLLCMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_SignificantInvestmentsInSubsidiariesDomain_019c0020-9b5d-7fc2-92ce-787f3b0f25b5" xlink:to="loc_ttam_MiamiValleyReadyMixFloridaLLCMember_019c0020-9b5d-7c97-ac72-971eba07687a" xlink:type="arc" order="23"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_SummitReadyMixLLCMember_019c0020-9b5d-779d-a1fa-1540435bf8d6" xlink:href="ttam-20251231.xsd#ttam_SummitReadyMixLLCMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_SignificantInvestmentsInSubsidiariesDomain_019c0020-9b5d-7fc2-92ce-787f3b0f25b5" xlink:to="loc_ttam_SummitReadyMixLLCMember_019c0020-9b5d-779d-a1fa-1540435bf8d6" xlink:type="arc" order="24"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_SilverSandTransportationLLCMember_019c0020-9b5d-71ac-93fa-faf531516d29" xlink:href="ttam-20251231.xsd#ttam_SilverSandTransportationLLCMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_SignificantInvestmentsInSubsidiariesDomain_019c0020-9b5d-7fc2-92ce-787f3b0f25b5" xlink:to="loc_ttam_SilverSandTransportationLLCMember_019c0020-9b5d-71ac-93fa-faf531516d29" xlink:type="arc" order="25"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_StandardConcreteLLCMember_019c0020-9b5d-7a2e-b955-dd963f4e3b6c" xlink:href="ttam-20251231.xsd#ttam_StandardConcreteLLCMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_SignificantInvestmentsInSubsidiariesDomain_019c0020-9b5d-7fc2-92ce-787f3b0f25b5" xlink:to="loc_ttam_StandardConcreteLLCMember_019c0020-9b5d-7a2e-b955-dd963f4e3b6c" xlink:type="arc" order="26"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_MasseySandAndRockCo.Member_019c0020-9b5d-71b9-b723-de51a625b1a9" xlink:href="ttam-20251231.xsd#ttam_MasseySandAndRockCo.Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_SignificantInvestmentsInSubsidiariesDomain_019c0020-9b5d-7fc2-92ce-787f3b0f25b5" xlink:to="loc_ttam_MasseySandAndRockCo.Member_019c0020-9b5d-71b9-b723-de51a625b1a9" xlink:type="arc" order="27"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_DalevilleDevelopmentLLCMember_019c0020-9b5d-7221-8e69-0455ad3e56c6" xlink:href="ttam-20251231.xsd#ttam_DalevilleDevelopmentLLCMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_SignificantInvestmentsInSubsidiariesDomain_019c0020-9b5d-7fc2-92ce-787f3b0f25b5" xlink:to="loc_ttam_DalevilleDevelopmentLLCMember_019c0020-9b5d-7221-8e69-0455ad3e56c6" xlink:type="arc" order="28"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_NestorTimberDevelopmentLLCMember_019c0020-9b5d-752d-bf66-8ff0b6f5ef25" xlink:href="ttam-20251231.xsd#ttam_NestorTimberDevelopmentLLCMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_SignificantInvestmentsInSubsidiariesDomain_019c0020-9b5d-7fc2-92ce-787f3b0f25b5" xlink:to="loc_ttam_NestorTimberDevelopmentLLCMember_019c0020-9b5d-752d-bf66-8ff0b6f5ef25" xlink:type="arc" order="29"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_SEILLCMember_019c0020-9b5d-798a-a896-bbfa2cea142d" xlink:href="ttam-20251231.xsd#ttam_SEILLCMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_SignificantInvestmentsInSubsidiariesDomain_019c0020-9b5d-7fc2-92ce-787f3b0f25b5" xlink:to="loc_ttam_SEILLCMember_019c0020-9b5d-798a-a896-bbfa2cea142d" xlink:type="arc" order="30"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_D.MConnerLLCMember_019c7f51-8968-73b1-a183-f73110ca3628" xlink:href="ttam-20251231.xsd#ttam_D.MConnerLLCMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_SignificantInvestmentsInSubsidiariesDomain_019c0020-9b5d-7fc2-92ce-787f3b0f25b5" xlink:to="loc_ttam_D.MConnerLLCMember_019c7f51-8968-73b1-a183-f73110ca3628" xlink:type="arc" order="31"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_MapleHoldingCompanyLLCMember_019c7f51-0334-744f-81e0-472fedf0df28" xlink:href="ttam-20251231.xsd#ttam_MapleHoldingCompanyLLCMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_SignificantInvestmentsInSubsidiariesDomain_019c0020-9b5d-7fc2-92ce-787f3b0f25b5" xlink:to="loc_ttam_MapleHoldingCompanyLLCMember_019c7f51-0334-744f-81e0-472fedf0df28" xlink:type="arc" order="32"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_TitanMidAltanticLLCMember_019c7f52-656d-7ff4-91b9-de99efeb6b41" xlink:href="ttam-20251231.xsd#ttam_TitanMidAltanticLLCMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_SignificantInvestmentsInSubsidiariesDomain_019c0020-9b5d-7fc2-92ce-787f3b0f25b5" xlink:to="loc_ttam_TitanMidAltanticLLCMember_019c7f52-656d-7ff4-91b9-de99efeb6b41" xlink:type="arc" order="33"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ProportionOfOwnershipInterestInSubsidiary_019c0020-9b5d-70ff-a414-e7a666ee8bcc" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ProportionOfOwnershipInterestInSubsidiary"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfSignificantInvestmentsInSubsidiariesLineItems_019c0020-9b5d-75a0-8880-a80c99217892" xlink:to="loc_ifrs-full_ProportionOfOwnershipInterestInSubsidiary_019c0020-9b5d-70ff-a414-e7a666ee8bcc" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.titanamerica.com/role/GeneralinformationandsummaryofmaterialaccountingpoliciesUsefulLifeofPropertyPlantandEquipmentDetails" xlink:type="simple" xlink:href="ttam-20251231.xsd#GeneralinformationandsummaryofmaterialaccountingpoliciesUsefulLifeofPropertyPlantandEquipmentDetails"/>
  <link:definitionLink xlink:role="http://www.titanamerica.com/role/GeneralinformationandsummaryofmaterialaccountingpoliciesUsefulLifeofPropertyPlantandEquipmentDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems_019c0020-9b5d-7bd5-895c-54c52eb40de4" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentTable_019c0020-9b5d-727a-9279-b11da86909e9" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfPropertyPlantAndEquipmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems_019c0020-9b5d-7bd5-895c-54c52eb40de4" xlink:to="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentTable_019c0020-9b5d-727a-9279-b11da86909e9" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RangeAxis_019c0020-9b5d-78b9-8099-a5fa50da39e3" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentTable_019c0020-9b5d-727a-9279-b11da86909e9" xlink:to="loc_ifrs-full_RangeAxis_019c0020-9b5d-78b9-8099-a5fa50da39e3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RangeDomain_019c0020-9b5d-78b9-8099-a5fa50da39e3_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_RangeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_RangeAxis_019c0020-9b5d-78b9-8099-a5fa50da39e3" xlink:to="loc_ifrs-full_RangeDomain_019c0020-9b5d-78b9-8099-a5fa50da39e3_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RangeDomain_019c0020-9b5d-7ce7-a49b-a85f1108ae94" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_RangeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_RangeAxis_019c0020-9b5d-78b9-8099-a5fa50da39e3" xlink:to="loc_ifrs-full_RangeDomain_019c0020-9b5d-7ce7-a49b-a85f1108ae94" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BottomOfRangeMember_019c0020-9b5d-7f62-a634-8d4ec84b63e9" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BottomOfRangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_RangeDomain_019c0020-9b5d-7ce7-a49b-a85f1108ae94" xlink:to="loc_ifrs-full_BottomOfRangeMember_019c0020-9b5d-7f62-a634-8d4ec84b63e9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TopOfRangeMember_019c0020-9b5d-7daf-9bcb-99a3540a5ff2" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TopOfRangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_RangeDomain_019c0020-9b5d-7ce7-a49b-a85f1108ae94" xlink:to="loc_ifrs-full_TopOfRangeMember_019c0020-9b5d-7daf-9bcb-99a3540a5ff2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis_019c0020-9b5d-7e60-9630-b9edc8236c10" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentTable_019c0020-9b5d-727a-9279-b11da86909e9" xlink:to="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis_019c0020-9b5d-7e60-9630-b9edc8236c10" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain_019c0020-9b5d-7e60-9630-b9edc8236c10_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis_019c0020-9b5d-7e60-9630-b9edc8236c10" xlink:to="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain_019c0020-9b5d-7e60-9630-b9edc8236c10_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain_019c0020-9b5d-7f01-830f-b10eab4ad5e8" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis_019c0020-9b5d-7e60-9630-b9edc8236c10" xlink:to="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain_019c0020-9b5d-7f01-830f-b10eab4ad5e8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_LandImprovements1Member_019c0020-9b5d-7a3f-93f5-9966b9ebef4d" xlink:href="ttam-20251231.xsd#ttam_LandImprovements1Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain_019c0020-9b5d-7f01-830f-b10eab4ad5e8" xlink:to="loc_ttam_LandImprovements1Member_019c0020-9b5d-7a3f-93f5-9966b9ebef4d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_BuildingsAndImprovementsMember_019c0020-9b5d-7a59-a8af-553f2ffec968" xlink:href="ttam-20251231.xsd#ttam_BuildingsAndImprovementsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain_019c0020-9b5d-7f01-830f-b10eab4ad5e8" xlink:to="loc_ttam_BuildingsAndImprovementsMember_019c0020-9b5d-7a59-a8af-553f2ffec968" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_MachineryAndEquipment1Member_019c0020-9b5d-77fb-bb61-f998b486eec5" xlink:href="ttam-20251231.xsd#ttam_MachineryAndEquipment1Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain_019c0020-9b5d-7f01-830f-b10eab4ad5e8" xlink:to="loc_ttam_MachineryAndEquipment1Member_019c0020-9b5d-77fb-bb61-f998b486eec5" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_MobileEquipmentMember_019c0020-9b5d-790f-9016-0a8281b88d57" xlink:href="ttam-20251231.xsd#ttam_MobileEquipmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain_019c0020-9b5d-7f01-830f-b10eab4ad5e8" xlink:to="loc_ttam_MobileEquipmentMember_019c0020-9b5d-790f-9016-0a8281b88d57" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_MarineEquipmentMember_019c0020-9b5d-795c-a325-dd9f2f827f1a" xlink:href="ttam-20251231.xsd#ttam_MarineEquipmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain_019c0020-9b5d-7f01-830f-b10eab4ad5e8" xlink:to="loc_ttam_MarineEquipmentMember_019c0020-9b5d-795c-a325-dd9f2f827f1a" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_MotorVehiclesMember_019c0020-9b5d-769a-910a-02a0ed84cacf" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_MotorVehiclesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain_019c0020-9b5d-7f01-830f-b10eab4ad5e8" xlink:to="loc_ifrs-full_MotorVehiclesMember_019c0020-9b5d-769a-910a-02a0ed84cacf" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_FixturesAndFittingsMember_019c0020-9b5d-791f-92e5-87f2b6153373" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_FixturesAndFittingsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain_019c0020-9b5d-7f01-830f-b10eab4ad5e8" xlink:to="loc_ifrs-full_FixturesAndFittingsMember_019c0020-9b5d-791f-92e5-87f2b6153373" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ProductsAndServicesAxis_019c0020-9b5d-7f96-ab22-347b74e37ffd" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ProductsAndServicesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentTable_019c0020-9b5d-727a-9279-b11da86909e9" xlink:to="loc_ifrs-full_ProductsAndServicesAxis_019c0020-9b5d-7f96-ab22-347b74e37ffd" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ProductsAndServicesDomain_019c0020-9b5d-7f96-ab22-347b74e37ffd_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_ProductsAndServicesAxis_019c0020-9b5d-7f96-ab22-347b74e37ffd" xlink:to="loc_ifrs-full_ProductsAndServicesDomain_019c0020-9b5d-7f96-ab22-347b74e37ffd_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ProductsAndServicesDomain_019c0020-9b5d-739e-8114-773567e67ac5" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_ProductsAndServicesAxis_019c0020-9b5d-7f96-ab22-347b74e37ffd" xlink:to="loc_ifrs-full_ProductsAndServicesDomain_019c0020-9b5d-739e-8114-773567e67ac5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_CementMember_019c0020-9b5d-7bb3-bf20-018b8884d3d3" xlink:href="ttam-20251231.xsd#ttam_CementMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ProductsAndServicesDomain_019c0020-9b5d-739e-8114-773567e67ac5" xlink:to="loc_ttam_CementMember_019c0020-9b5d-7bb3-bf20-018b8884d3d3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_AggregatesMember_019c0020-9b5d-7aa7-ad1f-22642c7c7f3c" xlink:href="ttam-20251231.xsd#ttam_AggregatesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ProductsAndServicesDomain_019c0020-9b5d-739e-8114-773567e67ac5" xlink:to="loc_ttam_AggregatesMember_019c0020-9b5d-7aa7-ad1f-22642c7c7f3c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_OtherProductLinesMember_019cf65d-9fdc-7a9e-b2f3-133ffa6c1bc6" xlink:href="ttam-20251231.xsd#ttam_OtherProductLinesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ProductsAndServicesDomain_019c0020-9b5d-739e-8114-773567e67ac5" xlink:to="loc_ttam_OtherProductLinesMember_019cf65d-9fdc-7a9e-b2f3-133ffa6c1bc6" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_UsefulLifeMeasuredAsPeriodOfTimePropertyPlantAndEquipment_019c0020-9b5d-7bc7-99f8-d50643bfb577" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_UsefulLifeMeasuredAsPeriodOfTimePropertyPlantAndEquipment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems_019c0020-9b5d-7bd5-895c-54c52eb40de4" xlink:to="loc_ifrs-full_UsefulLifeMeasuredAsPeriodOfTimePropertyPlantAndEquipment_019c0020-9b5d-7bc7-99f8-d50643bfb577" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.titanamerica.com/role/GeneralinformationandsummaryofmaterialaccountingpoliciesUsefulLifeofIntangibleAssetsDetails" xlink:type="simple" xlink:href="ttam-20251231.xsd#GeneralinformationandsummaryofmaterialaccountingpoliciesUsefulLifeofIntangibleAssetsDetails"/>
  <link:definitionLink xlink:role="http://www.titanamerica.com/role/GeneralinformationandsummaryofmaterialaccountingpoliciesUsefulLifeofIntangibleAssetsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfIntangibleAssetsLineItems_019c0020-9b5d-71b4-b912-96b4a499bc00" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfIntangibleAssetsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfIntangibleAssetsTable_019c0020-9b5d-70a6-9cbf-1606c5aa1d0c" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfIntangibleAssetsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfIntangibleAssetsLineItems_019c0020-9b5d-71b4-b912-96b4a499bc00" xlink:to="loc_ifrs-full_DisclosureOfIntangibleAssetsTable_019c0020-9b5d-70a6-9cbf-1606c5aa1d0c" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RangeAxis_019c0020-9b5d-7dbf-b0e8-e74a859530e6" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfIntangibleAssetsTable_019c0020-9b5d-70a6-9cbf-1606c5aa1d0c" xlink:to="loc_ifrs-full_RangeAxis_019c0020-9b5d-7dbf-b0e8-e74a859530e6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RangeDomain_019c0020-9b5d-7dbf-b0e8-e74a859530e6_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_RangeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_RangeAxis_019c0020-9b5d-7dbf-b0e8-e74a859530e6" xlink:to="loc_ifrs-full_RangeDomain_019c0020-9b5d-7dbf-b0e8-e74a859530e6_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RangeDomain_019c0020-9b5d-7d26-8603-8f2718fc68d6" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_RangeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_RangeAxis_019c0020-9b5d-7dbf-b0e8-e74a859530e6" xlink:to="loc_ifrs-full_RangeDomain_019c0020-9b5d-7d26-8603-8f2718fc68d6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BottomOfRangeMember_019c0020-9b5d-70b7-99b8-0928fb651482" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BottomOfRangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_RangeDomain_019c0020-9b5d-7d26-8603-8f2718fc68d6" xlink:to="loc_ifrs-full_BottomOfRangeMember_019c0020-9b5d-70b7-99b8-0928fb651482" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TopOfRangeMember_019c0020-9b5d-7c20-8fcd-bc9c8fa18911" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TopOfRangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_RangeDomain_019c0020-9b5d-7d26-8603-8f2718fc68d6" xlink:to="loc_ifrs-full_TopOfRangeMember_019c0020-9b5d-7c20-8fcd-bc9c8fa18911" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillAxis_019c0020-9b5d-71f3-97ee-4de724f51c84" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfIntangibleAssetsTable_019c0020-9b5d-70a6-9cbf-1606c5aa1d0c" xlink:to="loc_ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillAxis_019c0020-9b5d-71f3-97ee-4de724f51c84" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillDomain_019c0020-9b5d-71f3-97ee-4de724f51c84_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillAxis_019c0020-9b5d-71f3-97ee-4de724f51c84" xlink:to="loc_ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillDomain_019c0020-9b5d-71f3-97ee-4de724f51c84_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillDomain_019c0020-9b5d-7c67-b46c-402fdc7b35de" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillAxis_019c0020-9b5d-71f3-97ee-4de724f51c84" xlink:to="loc_ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillDomain_019c0020-9b5d-7c67-b46c-402fdc7b35de" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CustomerrelatedIntangibleAssetsMember_019c0020-9b5d-7747-a195-dbda4d9408de" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CustomerrelatedIntangibleAssetsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillDomain_019c0020-9b5d-7c67-b46c-402fdc7b35de" xlink:to="loc_ifrs-full_CustomerrelatedIntangibleAssetsMember_019c0020-9b5d-7747-a195-dbda4d9408de" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ComputerSoftwareMember_019c0020-9b5d-7eb1-9066-b7c15e04ba0a" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ComputerSoftwareMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillDomain_019c0020-9b5d-7c67-b46c-402fdc7b35de" xlink:to="loc_ifrs-full_ComputerSoftwareMember_019c0020-9b5d-7eb1-9066-b7c15e04ba0a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_UsefulLifeMeasuredAsPeriodOfTimeIntangibleAssetsOtherThanGoodwill_019c0020-9b5d-7545-b316-293f9f6885db" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_UsefulLifeMeasuredAsPeriodOfTimeIntangibleAssetsOtherThanGoodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfIntangibleAssetsLineItems_019c0020-9b5d-71b4-b912-96b4a499bc00" xlink:to="loc_ifrs-full_UsefulLifeMeasuredAsPeriodOfTimeIntangibleAssetsOtherThanGoodwill_019c0020-9b5d-7545-b316-293f9f6885db" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.titanamerica.com/role/SignificantaccountingestimatesandcriticaljudgmentsDetails" xlink:type="simple" xlink:href="ttam-20251231.xsd#SignificantaccountingestimatesandcriticaljudgmentsDetails"/>
  <link:definitionLink xlink:role="http://www.titanamerica.com/role/SignificantaccountingestimatesandcriticaljudgmentsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfChangesInAccountingEstimatesLineItems_019cd78c-4bb2-7e77-9b71-7469823bce20" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfChangesInAccountingEstimatesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfChangesInAccountingEstimatesTable_019cd78c-4bb2-74aa-8491-6da31d24fb2a" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfChangesInAccountingEstimatesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfChangesInAccountingEstimatesLineItems_019cd78c-4bb2-7e77-9b71-7469823bce20" xlink:to="loc_ifrs-full_DisclosureOfChangesInAccountingEstimatesTable_019cd78c-4bb2-74aa-8491-6da31d24fb2a" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CounterpartiesAxis_019cd78c-4bb2-778f-b278-7de1f5945d39" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CounterpartiesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfChangesInAccountingEstimatesTable_019cd78c-4bb2-74aa-8491-6da31d24fb2a" xlink:to="loc_ifrs-full_CounterpartiesAxis_019cd78c-4bb2-778f-b278-7de1f5945d39" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CounterpartiesDomain_019cd78c-4bb2-778f-b278-7de1f5945d39_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CounterpartiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_CounterpartiesAxis_019cd78c-4bb2-778f-b278-7de1f5945d39" xlink:to="loc_ifrs-full_CounterpartiesDomain_019cd78c-4bb2-778f-b278-7de1f5945d39_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CounterpartiesDomain_019cd78c-4bb2-745d-ab69-831e15bd13b9" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CounterpartiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_CounterpartiesAxis_019cd78c-4bb2-778f-b278-7de1f5945d39" xlink:to="loc_ifrs-full_CounterpartiesDomain_019cd78c-4bb2-745d-ab69-831e15bd13b9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_SpecialPurposeEntityMember_019cd78c-4bb2-77ec-8646-81d691838e11" xlink:href="ttam-20251231.xsd#ttam_SpecialPurposeEntityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_CounterpartiesDomain_019cd78c-4bb2-745d-ab69-831e15bd13b9" xlink:to="loc_ttam_SpecialPurposeEntityMember_019cd78c-4bb2-77ec-8646-81d691838e11" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_PotentialIncreaseInAssetUsefulLife_019c0020-9b5d-7f04-b8b0-6f2754904e5b" xlink:href="ttam-20251231.xsd#ttam_PotentialIncreaseInAssetUsefulLife"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfChangesInAccountingEstimatesLineItems_019cd78c-4bb2-7e77-9b71-7469823bce20" xlink:to="loc_ttam_PotentialIncreaseInAssetUsefulLife_019c0020-9b5d-7f04-b8b0-6f2754904e5b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_PotentialIncreaseInProfitLossBeforeTax_019c0020-9b5d-7152-858b-8097240f2293" xlink:href="ttam-20251231.xsd#ttam_PotentialIncreaseInProfitLossBeforeTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfChangesInAccountingEstimatesLineItems_019cd78c-4bb2-7e77-9b71-7469823bce20" xlink:to="loc_ttam_PotentialIncreaseInProfitLossBeforeTax_019c0020-9b5d-7152-858b-8097240f2293" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_PotentialDecreaseInAssetUsefulLife_019c0020-9b5d-72b2-a3e7-2be5dcf32556" xlink:href="ttam-20251231.xsd#ttam_PotentialDecreaseInAssetUsefulLife"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfChangesInAccountingEstimatesLineItems_019cd78c-4bb2-7e77-9b71-7469823bce20" xlink:to="loc_ttam_PotentialDecreaseInAssetUsefulLife_019c0020-9b5d-72b2-a3e7-2be5dcf32556" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_PotentialDecreaseInProfitLossBeforeTax_019c0020-9b5d-7ab7-88dc-146d5ed30333" xlink:href="ttam-20251231.xsd#ttam_PotentialDecreaseInProfitLossBeforeTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfChangesInAccountingEstimatesLineItems_019cd78c-4bb2-7e77-9b71-7469823bce20" xlink:to="loc_ttam_PotentialDecreaseInProfitLossBeforeTax_019c0020-9b5d-7ab7-88dc-146d5ed30333" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ImpairmentLossRecognisedInProfitOrLossTradeReceivables_019cd78c-4bb2-71ea-bacc-a072048666af" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ImpairmentLossRecognisedInProfitOrLossTradeReceivables"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfChangesInAccountingEstimatesLineItems_019cd78c-4bb2-7e77-9b71-7469823bce20" xlink:to="loc_ifrs-full_ImpairmentLossRecognisedInProfitOrLossTradeReceivables_019cd78c-4bb2-71ea-bacc-a072048666af" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ReceivablesDueFromAssociates_019cd78c-4bb2-73b9-a2b1-710a1351744f" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ReceivablesDueFromAssociates"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfChangesInAccountingEstimatesLineItems_019cd78c-4bb2-7e77-9b71-7469823bce20" xlink:to="loc_ifrs-full_ReceivablesDueFromAssociates_019cd78c-4bb2-73b9-a2b1-710a1351744f" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_OtherCurrentReceivables_019cd78c-4bb2-7491-8e51-aa34b0acb7ad" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_OtherCurrentReceivables"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfChangesInAccountingEstimatesLineItems_019cd78c-4bb2-7e77-9b71-7469823bce20" xlink:to="loc_ifrs-full_OtherCurrentReceivables_019cd78c-4bb2-7491-8e51-aa34b0acb7ad" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_TradeAccountsReceivableSold_019cd78c-4bb2-78ad-a054-3da508125d43" xlink:href="ttam-20251231.xsd#ttam_TradeAccountsReceivableSold"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfChangesInAccountingEstimatesLineItems_019cd78c-4bb2-7e77-9b71-7469823bce20" xlink:to="loc_ttam_TradeAccountsReceivableSold_019cd78c-4bb2-78ad-a054-3da508125d43" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_UndiscountedFutureCashFlowsNotIncludedInLeaseLiability_019c0020-9b5d-7642-b525-39c72a1b0ad5" xlink:href="ttam-20251231.xsd#ttam_UndiscountedFutureCashFlowsNotIncludedInLeaseLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfChangesInAccountingEstimatesLineItems_019cd78c-4bb2-7e77-9b71-7469823bce20" xlink:to="loc_ttam_UndiscountedFutureCashFlowsNotIncludedInLeaseLiability_019c0020-9b5d-7642-b525-39c72a1b0ad5" xlink:type="arc" order="8"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.titanamerica.com/role/RevenueDetails" xlink:type="simple" xlink:href="ttam-20251231.xsd#RevenueDetails"/>
  <link:definitionLink xlink:role="http://www.titanamerica.com/role/RevenueDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersLineItems_019c0020-9b5d-7742-837f-e08a8e90d6b4" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersTable_019c0020-9b5d-7cdb-89c0-2858a8f9c373" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersLineItems_019c0020-9b5d-7742-837f-e08a8e90d6b4" xlink:to="loc_ifrs-full_DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersTable_019c0020-9b5d-7cdb-89c0-2858a8f9c373" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ProductsAndServicesAxis_019c0020-9b5d-73a1-84a3-33eb2573ee19" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ProductsAndServicesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersTable_019c0020-9b5d-7cdb-89c0-2858a8f9c373" xlink:to="loc_ifrs-full_ProductsAndServicesAxis_019c0020-9b5d-73a1-84a3-33eb2573ee19" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ProductsAndServicesDomain_019c0020-9b5d-73a1-84a3-33eb2573ee19_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_ProductsAndServicesAxis_019c0020-9b5d-73a1-84a3-33eb2573ee19" xlink:to="loc_ifrs-full_ProductsAndServicesDomain_019c0020-9b5d-73a1-84a3-33eb2573ee19_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ProductsAndServicesDomain_019c0020-9b5d-73b0-938b-8f5c32f703e3" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_ProductsAndServicesAxis_019c0020-9b5d-73a1-84a3-33eb2573ee19" xlink:to="loc_ifrs-full_ProductsAndServicesDomain_019c0020-9b5d-73b0-938b-8f5c32f703e3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_CementMember_019c0020-9b5d-7a6c-b0b3-19d3b4d6f98c" xlink:href="ttam-20251231.xsd#ttam_CementMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ProductsAndServicesDomain_019c0020-9b5d-73b0-938b-8f5c32f703e3" xlink:to="loc_ttam_CementMember_019c0020-9b5d-7a6c-b0b3-19d3b4d6f98c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_AggregatesMember_019c0020-9b5d-7e0e-b6d8-af580e10a9c7" xlink:href="ttam-20251231.xsd#ttam_AggregatesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ProductsAndServicesDomain_019c0020-9b5d-73b0-938b-8f5c32f703e3" xlink:to="loc_ttam_AggregatesMember_019c0020-9b5d-7e0e-b6d8-af580e10a9c7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_ReadyMixConcreteMember_019c0020-9b5d-7012-b64d-8cf438d9cffe" xlink:href="ttam-20251231.xsd#ttam_ReadyMixConcreteMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ProductsAndServicesDomain_019c0020-9b5d-73b0-938b-8f5c32f703e3" xlink:to="loc_ttam_ReadyMixConcreteMember_019c0020-9b5d-7012-b64d-8cf438d9cffe" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_ConcreteBlockMember_019c0020-9b5d-7b16-bce8-6986f3da7eed" xlink:href="ttam-20251231.xsd#ttam_ConcreteBlockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ProductsAndServicesDomain_019c0020-9b5d-73b0-938b-8f5c32f703e3" xlink:to="loc_ttam_ConcreteBlockMember_019c0020-9b5d-7b16-bce8-6986f3da7eed" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_FlyAshMember_019c0020-9b5d-7a9e-8858-7a61c244b07b" xlink:href="ttam-20251231.xsd#ttam_FlyAshMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ProductsAndServicesDomain_019c0020-9b5d-73b0-938b-8f5c32f703e3" xlink:to="loc_ttam_FlyAshMember_019c0020-9b5d-7a9e-8858-7a61c244b07b" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_OtherGoodsAndServicesMember_019c0020-9b5d-7194-8e18-e178f52a75e8" xlink:href="ttam-20251231.xsd#ttam_OtherGoodsAndServicesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ProductsAndServicesDomain_019c0020-9b5d-73b0-938b-8f5c32f703e3" xlink:to="loc_ttam_OtherGoodsAndServicesMember_019c0020-9b5d-7194-8e18-e178f52a75e8" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RevenueFromContractsWithCustomers_019c0020-9b5d-78a2-8a3d-3c9a3ed660f9" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_RevenueFromContractsWithCustomers"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersLineItems_019c0020-9b5d-7742-837f-e08a8e90d6b4" xlink:to="loc_ifrs-full_RevenueFromContractsWithCustomers_019c0020-9b5d-78a2-8a3d-3c9a3ed660f9" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.titanamerica.com/role/CostofgoodssoldDetails" xlink:type="simple" xlink:href="ttam-20251231.xsd#CostofgoodssoldDetails"/>
  <link:definitionLink xlink:role="http://www.titanamerica.com/role/CostofgoodssoldDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfAttributionOfExpensesByNatureToTheirFunctionLineItems_019c0020-9b5d-7e11-b016-77a20ca3f69b" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfAttributionOfExpensesByNatureToTheirFunctionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfAttributionOfExpensesByNatureToTheirFunctionTable_019c0020-9b5d-7bf0-ad38-e5f80da182f8" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfAttributionOfExpensesByNatureToTheirFunctionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfAttributionOfExpensesByNatureToTheirFunctionLineItems_019c0020-9b5d-7e11-b016-77a20ca3f69b" xlink:to="loc_ifrs-full_DisclosureOfAttributionOfExpensesByNatureToTheirFunctionTable_019c0020-9b5d-7bf0-ad38-e5f80da182f8" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AttributionOfExpensesByNatureToTheirFunctionAxis_019c0020-9b5d-721c-bcc9-67d340449d54" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_AttributionOfExpensesByNatureToTheirFunctionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfAttributionOfExpensesByNatureToTheirFunctionTable_019c0020-9b5d-7bf0-ad38-e5f80da182f8" xlink:to="loc_ifrs-full_AttributionOfExpensesByNatureToTheirFunctionAxis_019c0020-9b5d-721c-bcc9-67d340449d54" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AttributionOfExpensesByNatureToTheirFunctionDomain_019c0020-9b5d-721c-bcc9-67d340449d54_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_AttributionOfExpensesByNatureToTheirFunctionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_AttributionOfExpensesByNatureToTheirFunctionAxis_019c0020-9b5d-721c-bcc9-67d340449d54" xlink:to="loc_ifrs-full_AttributionOfExpensesByNatureToTheirFunctionDomain_019c0020-9b5d-721c-bcc9-67d340449d54_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AttributionOfExpensesByNatureToTheirFunctionDomain_019c0020-9b5d-7075-9163-4d1d8aaac438" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_AttributionOfExpensesByNatureToTheirFunctionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_AttributionOfExpensesByNatureToTheirFunctionAxis_019c0020-9b5d-721c-bcc9-67d340449d54" xlink:to="loc_ifrs-full_AttributionOfExpensesByNatureToTheirFunctionDomain_019c0020-9b5d-7075-9163-4d1d8aaac438" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CostOfSalesMember_019c0020-9b5d-7fe7-a4ca-4fb1f3733a10" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CostOfSalesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_AttributionOfExpensesByNatureToTheirFunctionDomain_019c0020-9b5d-7075-9163-4d1d8aaac438" xlink:to="loc_ifrs-full_CostOfSalesMember_019c0020-9b5d-7fe7-a4ca-4fb1f3733a10" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CostOfInventoriesRecognisedAsExpenseDuringPeriod_019c0020-9b5d-71b8-8970-1a81269128a7" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CostOfInventoriesRecognisedAsExpenseDuringPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfAttributionOfExpensesByNatureToTheirFunctionLineItems_019c0020-9b5d-7e11-b016-77a20ca3f69b" xlink:to="loc_ifrs-full_CostOfInventoriesRecognisedAsExpenseDuringPeriod_019c0020-9b5d-71b8-8970-1a81269128a7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ChangesInInventoriesOfFinishedGoodsAndWorkInProgress_019c0020-9b5d-7a7e-a885-ebc83a5301ad" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ChangesInInventoriesOfFinishedGoodsAndWorkInProgress"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfAttributionOfExpensesByNatureToTheirFunctionLineItems_019c0020-9b5d-7e11-b016-77a20ca3f69b" xlink:to="loc_ifrs-full_ChangesInInventoriesOfFinishedGoodsAndWorkInProgress_019c0020-9b5d-7a7e-a885-ebc83a5301ad" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ShorttermEmployeeBenefitsExpense_019c0020-9b5d-7ae4-bd9b-f547724a7788" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ShorttermEmployeeBenefitsExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfAttributionOfExpensesByNatureToTheirFunctionLineItems_019c0020-9b5d-7e11-b016-77a20ca3f69b" xlink:to="loc_ifrs-full_ShorttermEmployeeBenefitsExpense_019c0020-9b5d-7ae4-bd9b-f547724a7788" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_ContractLaborAndRelatedExpenses_019cf672-418a-7298-8fdc-8339683a7a6e" xlink:href="ttam-20251231.xsd#ttam_ContractLaborAndRelatedExpenses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfAttributionOfExpensesByNatureToTheirFunctionLineItems_019c0020-9b5d-7e11-b016-77a20ca3f69b" xlink:to="loc_ttam_ContractLaborAndRelatedExpenses_019cf672-418a-7298-8fdc-8339683a7a6e" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_FuelAndEnergyExpense_019c0020-9b5d-70ca-a8b2-c597501a6598" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_FuelAndEnergyExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfAttributionOfExpensesByNatureToTheirFunctionLineItems_019c0020-9b5d-7e11-b016-77a20ca3f69b" xlink:to="loc_ifrs-full_FuelAndEnergyExpense_019c0020-9b5d-70ca-a8b2-c597501a6598" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DepreciationAndAmortisationExpense_019c0020-9b5d-7d43-8d1f-d2e16f6d61b4" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DepreciationAndAmortisationExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfAttributionOfExpensesByNatureToTheirFunctionLineItems_019c0020-9b5d-7e11-b016-77a20ca3f69b" xlink:to="loc_ifrs-full_DepreciationAndAmortisationExpense_019c0020-9b5d-7d43-8d1f-d2e16f6d61b4" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TransportationExpense_019c0020-9b5d-7334-a58f-b44a78ab833d" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TransportationExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfAttributionOfExpensesByNatureToTheirFunctionLineItems_019c0020-9b5d-7e11-b016-77a20ca3f69b" xlink:to="loc_ifrs-full_TransportationExpense_019c0020-9b5d-7334-a58f-b44a78ab833d" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DistributionCosts_019c0020-9b5d-722a-ab3c-6b0e357e7ab9" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DistributionCosts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfAttributionOfExpensesByNatureToTheirFunctionLineItems_019c0020-9b5d-7e11-b016-77a20ca3f69b" xlink:to="loc_ifrs-full_DistributionCosts_019c0020-9b5d-722a-ab3c-6b0e357e7ab9" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RepairsAndMaintenanceExpense_019c0020-9b5d-7310-b5d7-d8d3fe9d2022" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_RepairsAndMaintenanceExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfAttributionOfExpensesByNatureToTheirFunctionLineItems_019c0020-9b5d-7e11-b016-77a20ca3f69b" xlink:to="loc_ifrs-full_RepairsAndMaintenanceExpense_019c0020-9b5d-7310-b5d7-d8d3fe9d2022" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TaxExpenseOtherThanIncomeTaxExpense_019c0020-9b5d-7da2-8b1f-f6862f142547" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TaxExpenseOtherThanIncomeTaxExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfAttributionOfExpensesByNatureToTheirFunctionLineItems_019c0020-9b5d-7e11-b016-77a20ca3f69b" xlink:to="loc_ifrs-full_TaxExpenseOtherThanIncomeTaxExpense_019c0020-9b5d-7da2-8b1f-f6862f142547" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ExpenseRelatingToShorttermLeasesForWhichRecognitionExemptionHasBeenUsed_019c0020-9b5d-7cda-89f6-3e4d6d2bdc61" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ExpenseRelatingToShorttermLeasesForWhichRecognitionExemptionHasBeenUsed"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfAttributionOfExpensesByNatureToTheirFunctionLineItems_019c0020-9b5d-7e11-b016-77a20ca3f69b" xlink:to="loc_ifrs-full_ExpenseRelatingToShorttermLeasesForWhichRecognitionExemptionHasBeenUsed_019c0020-9b5d-7cda-89f6-3e4d6d2bdc61" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_RiskInsuranceExpenseIncludingLossRetention_019c0020-9b5d-7dd2-876f-3b5fc7c6702e" xlink:href="ttam-20251231.xsd#ttam_RiskInsuranceExpenseIncludingLossRetention"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfAttributionOfExpensesByNatureToTheirFunctionLineItems_019c0020-9b5d-7e11-b016-77a20ca3f69b" xlink:to="loc_ttam_RiskInsuranceExpenseIncludingLossRetention_019c0020-9b5d-7dd2-876f-3b5fc7c6702e" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_OtherExpenseByNature_019c0020-9b5d-706c-8d44-fde9c468290b" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_OtherExpenseByNature"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfAttributionOfExpensesByNatureToTheirFunctionLineItems_019c0020-9b5d-7e11-b016-77a20ca3f69b" xlink:to="loc_ifrs-full_OtherExpenseByNature_019c0020-9b5d-706c-8d44-fde9c468290b" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CostOfSales_019c0020-9b5d-7349-bfb8-53d77e745719" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CostOfSales"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfAttributionOfExpensesByNatureToTheirFunctionLineItems_019c0020-9b5d-7e11-b016-77a20ca3f69b" xlink:to="loc_ifrs-full_CostOfSales_019c0020-9b5d-7349-bfb8-53d77e745719" xlink:type="arc" order="13"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.titanamerica.com/role/SellingexpenseDetails" xlink:type="simple" xlink:href="ttam-20251231.xsd#SellingexpenseDetails"/>
  <link:definitionLink xlink:role="http://www.titanamerica.com/role/SellingexpenseDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfAttributionOfExpensesByNatureToTheirFunctionLineItems_019c0020-9b5d-7175-a04e-b26218088bc6" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfAttributionOfExpensesByNatureToTheirFunctionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfAttributionOfExpensesByNatureToTheirFunctionTable_019c0020-9b5d-7685-b5dc-80b926c4538d" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfAttributionOfExpensesByNatureToTheirFunctionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfAttributionOfExpensesByNatureToTheirFunctionLineItems_019c0020-9b5d-7175-a04e-b26218088bc6" xlink:to="loc_ifrs-full_DisclosureOfAttributionOfExpensesByNatureToTheirFunctionTable_019c0020-9b5d-7685-b5dc-80b926c4538d" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AttributionOfExpensesByNatureToTheirFunctionAxis_019c0020-9b5d-7494-971a-66808fc1a973" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_AttributionOfExpensesByNatureToTheirFunctionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfAttributionOfExpensesByNatureToTheirFunctionTable_019c0020-9b5d-7685-b5dc-80b926c4538d" xlink:to="loc_ifrs-full_AttributionOfExpensesByNatureToTheirFunctionAxis_019c0020-9b5d-7494-971a-66808fc1a973" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AttributionOfExpensesByNatureToTheirFunctionDomain_019c0020-9b5d-7494-971a-66808fc1a973_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_AttributionOfExpensesByNatureToTheirFunctionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_AttributionOfExpensesByNatureToTheirFunctionAxis_019c0020-9b5d-7494-971a-66808fc1a973" xlink:to="loc_ifrs-full_AttributionOfExpensesByNatureToTheirFunctionDomain_019c0020-9b5d-7494-971a-66808fc1a973_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AttributionOfExpensesByNatureToTheirFunctionDomain_019c0020-9b5d-70e2-99da-117fe6f2d040" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_AttributionOfExpensesByNatureToTheirFunctionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_AttributionOfExpensesByNatureToTheirFunctionAxis_019c0020-9b5d-7494-971a-66808fc1a973" xlink:to="loc_ifrs-full_AttributionOfExpensesByNatureToTheirFunctionDomain_019c0020-9b5d-70e2-99da-117fe6f2d040" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_SellingExpenseMember_019c0020-9b5d-770c-89bf-c92f1b5d305e" xlink:href="ttam-20251231.xsd#ttam_SellingExpenseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_AttributionOfExpensesByNatureToTheirFunctionDomain_019c0020-9b5d-70e2-99da-117fe6f2d040" xlink:to="loc_ttam_SellingExpenseMember_019c0020-9b5d-770c-89bf-c92f1b5d305e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ShorttermEmployeeBenefitsExpense_019c0020-9b5d-7898-86c5-52c081ff06ff" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ShorttermEmployeeBenefitsExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfAttributionOfExpensesByNatureToTheirFunctionLineItems_019c0020-9b5d-7175-a04e-b26218088bc6" xlink:to="loc_ifrs-full_ShorttermEmployeeBenefitsExpense_019c0020-9b5d-7898-86c5-52c081ff06ff" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_MiscellaneousOtherOperatingExpense_019c0020-9b5d-7c33-a96b-9133792a44a8" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_MiscellaneousOtherOperatingExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfAttributionOfExpensesByNatureToTheirFunctionLineItems_019c0020-9b5d-7175-a04e-b26218088bc6" xlink:to="loc_ifrs-full_MiscellaneousOtherOperatingExpense_019c0020-9b5d-7c33-a96b-9133792a44a8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_OtherExpenseByNature_019c0020-9b5d-7379-a6ac-7b835d7433e0" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_OtherExpenseByNature"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfAttributionOfExpensesByNatureToTheirFunctionLineItems_019c0020-9b5d-7175-a04e-b26218088bc6" xlink:to="loc_ifrs-full_OtherExpenseByNature_019c0020-9b5d-7379-a6ac-7b835d7433e0" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_SellingExpense_019c0020-9b5d-767b-bd6d-2b5d218b68fe" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_SellingExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfAttributionOfExpensesByNatureToTheirFunctionLineItems_019c0020-9b5d-7175-a04e-b26218088bc6" xlink:to="loc_ifrs-full_SellingExpense_019c0020-9b5d-767b-bd6d-2b5d218b68fe" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.titanamerica.com/role/GeneralandadministrativeexpenseDetails" xlink:type="simple" xlink:href="ttam-20251231.xsd#GeneralandadministrativeexpenseDetails"/>
  <link:definitionLink xlink:role="http://www.titanamerica.com/role/GeneralandadministrativeexpenseDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfAttributionOfExpensesByNatureToTheirFunctionLineItems_019c0020-9b5e-709c-98f4-586039d0ff94" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfAttributionOfExpensesByNatureToTheirFunctionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfAttributionOfExpensesByNatureToTheirFunctionTable_019c0020-9b5d-702d-95be-cb64c00a9613" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfAttributionOfExpensesByNatureToTheirFunctionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfAttributionOfExpensesByNatureToTheirFunctionLineItems_019c0020-9b5e-709c-98f4-586039d0ff94" xlink:to="loc_ifrs-full_DisclosureOfAttributionOfExpensesByNatureToTheirFunctionTable_019c0020-9b5d-702d-95be-cb64c00a9613" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AttributionOfExpensesByNatureToTheirFunctionAxis_019c0020-9b5e-7e0a-b37c-23256d05fe88" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_AttributionOfExpensesByNatureToTheirFunctionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfAttributionOfExpensesByNatureToTheirFunctionTable_019c0020-9b5d-702d-95be-cb64c00a9613" xlink:to="loc_ifrs-full_AttributionOfExpensesByNatureToTheirFunctionAxis_019c0020-9b5e-7e0a-b37c-23256d05fe88" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AttributionOfExpensesByNatureToTheirFunctionDomain_019c0020-9b5e-7e0a-b37c-23256d05fe88_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_AttributionOfExpensesByNatureToTheirFunctionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_AttributionOfExpensesByNatureToTheirFunctionAxis_019c0020-9b5e-7e0a-b37c-23256d05fe88" xlink:to="loc_ifrs-full_AttributionOfExpensesByNatureToTheirFunctionDomain_019c0020-9b5e-7e0a-b37c-23256d05fe88_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AttributionOfExpensesByNatureToTheirFunctionDomain_019c0020-9b5e-72fc-bf02-b99d0a3915a2" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_AttributionOfExpensesByNatureToTheirFunctionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_AttributionOfExpensesByNatureToTheirFunctionAxis_019c0020-9b5e-7e0a-b37c-23256d05fe88" xlink:to="loc_ifrs-full_AttributionOfExpensesByNatureToTheirFunctionDomain_019c0020-9b5e-72fc-bf02-b99d0a3915a2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_GeneralAndAdministrativeExpense1Member_019c0020-9b5e-7eca-9cbe-a2dad3cea78b" xlink:href="ttam-20251231.xsd#ttam_GeneralAndAdministrativeExpense1Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_AttributionOfExpensesByNatureToTheirFunctionDomain_019c0020-9b5e-72fc-bf02-b99d0a3915a2" xlink:to="loc_ttam_GeneralAndAdministrativeExpense1Member_019c0020-9b5e-7eca-9cbe-a2dad3cea78b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ShorttermEmployeeBenefitsExpense_019c0020-9b5e-7c21-834d-1efec1da565b" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ShorttermEmployeeBenefitsExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfAttributionOfExpensesByNatureToTheirFunctionLineItems_019c0020-9b5e-709c-98f4-586039d0ff94" xlink:to="loc_ifrs-full_ShorttermEmployeeBenefitsExpense_019c0020-9b5e-7c21-834d-1efec1da565b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DepreciationAndAmortisationExpense_019c0020-9b5e-79cb-862b-9d476e10f792" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DepreciationAndAmortisationExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfAttributionOfExpensesByNatureToTheirFunctionLineItems_019c0020-9b5e-709c-98f4-586039d0ff94" xlink:to="loc_ifrs-full_DepreciationAndAmortisationExpense_019c0020-9b5e-79cb-862b-9d476e10f792" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_ManagementFees_019c0020-9b5e-7cb7-b123-5e01f7ebe7d8" xlink:href="ttam-20251231.xsd#ttam_ManagementFees"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfAttributionOfExpensesByNatureToTheirFunctionLineItems_019c0020-9b5e-709c-98f4-586039d0ff94" xlink:to="loc_ttam_ManagementFees_019c0020-9b5e-7cb7-b123-5e01f7ebe7d8" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_ServiceContractsExpense_019c0020-9b5e-77fe-a56e-e37a927c30ce" xlink:href="ttam-20251231.xsd#ttam_ServiceContractsExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfAttributionOfExpensesByNatureToTheirFunctionLineItems_019c0020-9b5e-709c-98f4-586039d0ff94" xlink:to="loc_ttam_ServiceContractsExpense_019c0020-9b5e-77fe-a56e-e37a927c30ce" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_OfficeCosts_019c0020-9b5e-7db1-bd18-de76a6e57988" xlink:href="ttam-20251231.xsd#ttam_OfficeCosts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfAttributionOfExpensesByNatureToTheirFunctionLineItems_019c0020-9b5e-709c-98f4-586039d0ff94" xlink:to="loc_ttam_OfficeCosts_019c0020-9b5e-7db1-bd18-de76a6e57988" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ProfessionalFeesExpense_019c0020-9b5e-774c-9243-a4bfe43d4765" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ProfessionalFeesExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfAttributionOfExpensesByNatureToTheirFunctionLineItems_019c0020-9b5e-709c-98f4-586039d0ff94" xlink:to="loc_ifrs-full_ProfessionalFeesExpense_019c0020-9b5e-774c-9243-a4bfe43d4765" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_OtherExpenseByNature_019c0020-9b5e-7fc6-a914-56808c19e114" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_OtherExpenseByNature"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfAttributionOfExpensesByNatureToTheirFunctionLineItems_019c0020-9b5e-709c-98f4-586039d0ff94" xlink:to="loc_ifrs-full_OtherExpenseByNature_019c0020-9b5e-7fc6-a914-56808c19e114" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_GeneralAndAdministrativeExpense_019c0020-9b5e-7b65-8f9e-c31c64ca3fb5" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_GeneralAndAdministrativeExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfAttributionOfExpensesByNatureToTheirFunctionLineItems_019c0020-9b5e-709c-98f4-586039d0ff94" xlink:to="loc_ifrs-full_GeneralAndAdministrativeExpense_019c0020-9b5e-7b65-8f9e-c31c64ca3fb5" xlink:type="arc" order="7"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.titanamerica.com/role/ForeignexchangeandderivativefinancialinstrumentsForeignExchangeGainsLossesDetails" xlink:type="simple" xlink:href="ttam-20251231.xsd#ForeignexchangeandderivativefinancialinstrumentsForeignExchangeGainsLossesDetails"/>
  <link:definitionLink xlink:role="http://www.titanamerica.com/role/ForeignexchangeandderivativefinancialinstrumentsForeignExchangeGainsLossesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ttam_DisclosureOfForeignExchangeGainLossLineItems_019c0020-9b5e-71c7-85e5-9690851546b5" xlink:href="ttam-20251231.xsd#ttam_DisclosureOfForeignExchangeGainLossLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_DisclosureOfForeignExchangeGainLossTable_019c0020-9b5e-7e28-a629-3eecc4e42483" xlink:href="ttam-20251231.xsd#ttam_DisclosureOfForeignExchangeGainLossTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ttam_DisclosureOfForeignExchangeGainLossLineItems_019c0020-9b5e-71c7-85e5-9690851546b5" xlink:to="loc_ttam_DisclosureOfForeignExchangeGainLossTable_019c0020-9b5e-7e28-a629-3eecc4e42483" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfFinancialInstrumentsAxis_019c0020-9b5e-7204-ba26-6fe34fa9d600" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfFinancialInstrumentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ttam_DisclosureOfForeignExchangeGainLossTable_019c0020-9b5e-7e28-a629-3eecc4e42483" xlink:to="loc_ifrs-full_ClassesOfFinancialInstrumentsAxis_019c0020-9b5e-7204-ba26-6fe34fa9d600" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfFinancialInstrumentsDomain_019c0020-9b5e-7204-ba26-6fe34fa9d600_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_ClassesOfFinancialInstrumentsAxis_019c0020-9b5e-7204-ba26-6fe34fa9d600" xlink:to="loc_ifrs-full_ClassesOfFinancialInstrumentsDomain_019c0020-9b5e-7204-ba26-6fe34fa9d600_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfFinancialInstrumentsDomain_019c0020-9b5e-7371-bcfd-e3fc833277fa" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_ClassesOfFinancialInstrumentsAxis_019c0020-9b5e-7204-ba26-6fe34fa9d600" xlink:to="loc_ifrs-full_ClassesOfFinancialInstrumentsDomain_019c0020-9b5e-7371-bcfd-e3fc833277fa" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_FixedRateLoanOneHundredFiftyMillionMember_019c0020-9b5e-7e30-8462-4f9bbbaf241f" xlink:href="ttam-20251231.xsd#ttam_FixedRateLoanOneHundredFiftyMillionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfFinancialInstrumentsDomain_019c0020-9b5e-7371-bcfd-e3fc833277fa" xlink:to="loc_ttam_FixedRateLoanOneHundredFiftyMillionMember_019c0020-9b5e-7e30-8462-4f9bbbaf241f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_FixedRateLoanOneHundredTwentyMillionMember_019c0020-9b5e-79f5-aa9d-5791e3e89869" xlink:href="ttam-20251231.xsd#ttam_FixedRateLoanOneHundredTwentyMillionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfFinancialInstrumentsDomain_019c0020-9b5e-7371-bcfd-e3fc833277fa" xlink:to="loc_ttam_FixedRateLoanOneHundredTwentyMillionMember_019c0020-9b5e-79f5-aa9d-5791e3e89869" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_FixedRateLoanOneHundredMillionMember_019c0020-9b5e-74b5-b1fb-0e858401bf8f" xlink:href="ttam-20251231.xsd#ttam_FixedRateLoanOneHundredMillionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfFinancialInstrumentsDomain_019c0020-9b5e-7371-bcfd-e3fc833277fa" xlink:to="loc_ttam_FixedRateLoanOneHundredMillionMember_019c0020-9b5e-74b5-b1fb-0e858401bf8f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_FixedRateLoanFiftyMillionMember_019c0020-9b5e-76e6-b0f8-3d25c45143bd" xlink:href="ttam-20251231.xsd#ttam_FixedRateLoanFiftyMillionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfFinancialInstrumentsDomain_019c0020-9b5e-7371-bcfd-e3fc833277fa" xlink:to="loc_ttam_FixedRateLoanFiftyMillionMember_019c0020-9b5e-76e6-b0f8-3d25c45143bd" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_FixedRateLoanSeventyFiveMillionMember_019c0020-9b5e-72b6-8247-769293b19558" xlink:href="ttam-20251231.xsd#ttam_FixedRateLoanSeventyFiveMillionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfFinancialInstrumentsDomain_019c0020-9b5e-7371-bcfd-e3fc833277fa" xlink:to="loc_ttam_FixedRateLoanSeventyFiveMillionMember_019c0020-9b5e-72b6-8247-769293b19558" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_FixedRateLoanFortyFiveMillionMember_019c0020-9b5e-7d33-875f-8f1151250544" xlink:href="ttam-20251231.xsd#ttam_FixedRateLoanFortyFiveMillionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfFinancialInstrumentsDomain_019c0020-9b5e-7371-bcfd-e3fc833277fa" xlink:to="loc_ttam_FixedRateLoanFortyFiveMillionMember_019c0020-9b5e-7d33-875f-8f1151250544" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_FixedRateLoanThirtyTwoMillionEightHundredThousandMember_019c0020-9b5e-7131-abb7-de7a7970833f" xlink:href="ttam-20251231.xsd#ttam_FixedRateLoanThirtyTwoMillionEightHundredThousandMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfFinancialInstrumentsDomain_019c0020-9b5e-7371-bcfd-e3fc833277fa" xlink:to="loc_ttam_FixedRateLoanThirtyTwoMillionEightHundredThousandMember_019c0020-9b5e-7131-abb7-de7a7970833f" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_EuroRevolvingCreditFacilityMember_019c0020-9b5e-7af4-94c2-40145cd79b20" xlink:href="ttam-20251231.xsd#ttam_EuroRevolvingCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfFinancialInstrumentsDomain_019c0020-9b5e-7371-bcfd-e3fc833277fa" xlink:to="loc_ttam_EuroRevolvingCreditFacilityMember_019c0020-9b5e-7af4-94c2-40145cd79b20" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_OtherFinancialAssetsAndLiabilitiesMember_019c0020-9b5e-70d9-a6d5-47b784c43aa9" xlink:href="ttam-20251231.xsd#ttam_OtherFinancialAssetsAndLiabilitiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfFinancialInstrumentsDomain_019c0020-9b5e-7371-bcfd-e3fc833277fa" xlink:to="loc_ttam_OtherFinancialAssetsAndLiabilitiesMember_019c0020-9b5e-70d9-a6d5-47b784c43aa9" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NotionalAmount_019c0020-9b5e-7bc7-b4ad-edf9638ec0b6" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NotionalAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ttam_DisclosureOfForeignExchangeGainLossLineItems_019c0020-9b5e-71c7-85e5-9690851546b5" xlink:to="loc_ifrs-full_NotionalAmount_019c0020-9b5e-7bc7-b4ad-edf9638ec0b6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_RemeasurementAndSettlementOfLoanObligationsPrincipal_019c0020-9b5e-7c23-a40e-aed795ed1687" xlink:href="ttam-20251231.xsd#ttam_RemeasurementAndSettlementOfLoanObligationsPrincipal"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ttam_DisclosureOfForeignExchangeGainLossLineItems_019c0020-9b5e-71c7-85e5-9690851546b5" xlink:to="loc_ttam_RemeasurementAndSettlementOfLoanObligationsPrincipal_019c0020-9b5e-7c23-a40e-aed795ed1687" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_RemeasurementAndSettlementOfLoanObligationsFinanceCost_019c0020-9b5e-78ad-8440-21c703293c1e" xlink:href="ttam-20251231.xsd#ttam_RemeasurementAndSettlementOfLoanObligationsFinanceCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ttam_DisclosureOfForeignExchangeGainLossLineItems_019c0020-9b5e-71c7-85e5-9690851546b5" xlink:to="loc_ttam_RemeasurementAndSettlementOfLoanObligationsFinanceCost_019c0020-9b5e-78ad-8440-21c703293c1e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_OtherForeignExchangeGainLoss_019c0020-9b5e-7665-a467-b7936538e97e" xlink:href="ttam-20251231.xsd#ttam_OtherForeignExchangeGainLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ttam_DisclosureOfForeignExchangeGainLossLineItems_019c0020-9b5e-71c7-85e5-9690851546b5" xlink:to="loc_ttam_OtherForeignExchangeGainLoss_019c0020-9b5e-7665-a467-b7936538e97e" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_GainsLossesOnExchangeDifferencesOnTranslationRecognisedInProfitOrLoss_019c0020-9b5e-733b-baf8-ef1526457b0e" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_GainsLossesOnExchangeDifferencesOnTranslationRecognisedInProfitOrLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ttam_DisclosureOfForeignExchangeGainLossLineItems_019c0020-9b5e-71c7-85e5-9690851546b5" xlink:to="loc_ifrs-full_GainsLossesOnExchangeDifferencesOnTranslationRecognisedInProfitOrLoss_019c0020-9b5e-733b-baf8-ef1526457b0e" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.titanamerica.com/role/ForeignexchangeandderivativefinancialinstrumentsDerivativeGainsLossesDetails" xlink:type="simple" xlink:href="ttam-20251231.xsd#ForeignexchangeandderivativefinancialinstrumentsDerivativeGainsLossesDetails"/>
  <link:definitionLink xlink:role="http://www.titanamerica.com/role/ForeignexchangeandderivativefinancialinstrumentsDerivativeGainsLossesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfFinancialInstrumentsLineItems_019c0020-9b5e-7c08-961c-cbb6b011c1c2" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfFinancialInstrumentsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfFinancialInstrumentsTable_019c0020-9b5e-7f41-835f-7f9e051a0be7" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfFinancialInstrumentsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfFinancialInstrumentsLineItems_019c0020-9b5e-7c08-961c-cbb6b011c1c2" xlink:to="loc_ifrs-full_DisclosureOfFinancialInstrumentsTable_019c0020-9b5e-7f41-835f-7f9e051a0be7" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_HedgingInstrumentsAxis_019c0020-9b5e-7be4-8e3e-f205a2d68f6a" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_HedgingInstrumentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfFinancialInstrumentsTable_019c0020-9b5e-7f41-835f-7f9e051a0be7" xlink:to="loc_ifrs-full_HedgingInstrumentsAxis_019c0020-9b5e-7be4-8e3e-f205a2d68f6a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_HedgingInstrumentsDomain_019c0020-9b5e-7be4-8e3e-f205a2d68f6a_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_HedgingInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_HedgingInstrumentsAxis_019c0020-9b5e-7be4-8e3e-f205a2d68f6a" xlink:to="loc_ifrs-full_HedgingInstrumentsDomain_019c0020-9b5e-7be4-8e3e-f205a2d68f6a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_HedgingInstrumentsDomain_019c0020-9b5e-72f2-8dbc-8d9a395ad4c2" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_HedgingInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_HedgingInstrumentsAxis_019c0020-9b5e-7be4-8e3e-f205a2d68f6a" xlink:to="loc_ifrs-full_HedgingInstrumentsDomain_019c0020-9b5e-72f2-8dbc-8d9a395ad4c2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_CrossCurrencyInterestRateSwapMaturing2024Member_019c0020-9b5e-7fc3-95a4-c53731f6f58e" xlink:href="ttam-20251231.xsd#ttam_CrossCurrencyInterestRateSwapMaturing2024Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_HedgingInstrumentsDomain_019c0020-9b5e-72f2-8dbc-8d9a395ad4c2" xlink:to="loc_ttam_CrossCurrencyInterestRateSwapMaturing2024Member_019c0020-9b5e-7fc3-95a4-c53731f6f58e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_CrossCurrencyInterestRateSwapMaturingJuly2027Member_019c0020-9b5e-792d-b0ad-a09272f47373" xlink:href="ttam-20251231.xsd#ttam_CrossCurrencyInterestRateSwapMaturingJuly2027Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_HedgingInstrumentsDomain_019c0020-9b5e-72f2-8dbc-8d9a395ad4c2" xlink:to="loc_ttam_CrossCurrencyInterestRateSwapMaturingJuly2027Member_019c0020-9b5e-792d-b0ad-a09272f47373" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_CrossCurrencyInterestRateSwapMaturingJune2029Member_019c0020-9b5e-7313-85f6-072d451755a8" xlink:href="ttam-20251231.xsd#ttam_CrossCurrencyInterestRateSwapMaturingJune2029Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_HedgingInstrumentsDomain_019c0020-9b5e-72f2-8dbc-8d9a395ad4c2" xlink:to="loc_ttam_CrossCurrencyInterestRateSwapMaturingJune2029Member_019c0020-9b5e-7313-85f6-072d451755a8" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_CrossCurrencyInterestRateSwapsOneHundredFiftyMillionMember_019c7fd9-608d-74c8-984a-4885cd5e2923" xlink:href="ttam-20251231.xsd#ttam_CrossCurrencyInterestRateSwapsOneHundredFiftyMillionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_HedgingInstrumentsDomain_019c0020-9b5e-72f2-8dbc-8d9a395ad4c2" xlink:to="loc_ttam_CrossCurrencyInterestRateSwapsOneHundredFiftyMillionMember_019c7fd9-608d-74c8-984a-4885cd5e2923" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_ForeignExchangeForwardFiftyMillionEightHundredThousandMember_019c0020-9b5e-7965-964b-714e823dd178" xlink:href="ttam-20251231.xsd#ttam_ForeignExchangeForwardFiftyMillionEightHundredThousandMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_HedgingInstrumentsDomain_019c0020-9b5e-72f2-8dbc-8d9a395ad4c2" xlink:to="loc_ttam_ForeignExchangeForwardFiftyMillionEightHundredThousandMember_019c0020-9b5e-7965-964b-714e823dd178" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_ForeignExchangeForwardFortyTwoMillionMember_019c0020-9b5e-7b20-942f-427c7c535cef" xlink:href="ttam-20251231.xsd#ttam_ForeignExchangeForwardFortyTwoMillionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_HedgingInstrumentsDomain_019c0020-9b5e-72f2-8dbc-8d9a395ad4c2" xlink:to="loc_ttam_ForeignExchangeForwardFortyTwoMillionMember_019c0020-9b5e-7b20-942f-427c7c535cef" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_ForeignExchangeForwardThirtyMillionMember_019c0020-9b5e-7b66-b2af-ba6e390e3456" xlink:href="ttam-20251231.xsd#ttam_ForeignExchangeForwardThirtyMillionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_HedgingInstrumentsDomain_019c0020-9b5e-72f2-8dbc-8d9a395ad4c2" xlink:to="loc_ttam_ForeignExchangeForwardThirtyMillionMember_019c0020-9b5e-7b66-b2af-ba6e390e3456" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_ForeignExchangeForwardEuroRevolvingCreditFacilityMember_019c0020-9b5e-7574-be3b-50d197e47d7a" xlink:href="ttam-20251231.xsd#ttam_ForeignExchangeForwardEuroRevolvingCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_HedgingInstrumentsDomain_019c0020-9b5e-72f2-8dbc-8d9a395ad4c2" xlink:to="loc_ttam_ForeignExchangeForwardEuroRevolvingCreditFacilityMember_019c0020-9b5e-7574-be3b-50d197e47d7a" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_ForeignExchangeForward1Member_019c0020-9b5e-7761-a0a6-f6a7d6b52c55" xlink:href="ttam-20251231.xsd#ttam_ForeignExchangeForward1Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_HedgingInstrumentsDomain_019c0020-9b5e-72f2-8dbc-8d9a395ad4c2" xlink:to="loc_ttam_ForeignExchangeForward1Member_019c0020-9b5e-7761-a0a6-f6a7d6b52c55" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NotionalAmount_019c0020-9b5e-7aef-99f7-03006d0a6187" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NotionalAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfFinancialInstrumentsLineItems_019c0020-9b5e-7c08-961c-cbb6b011c1c2" xlink:to="loc_ifrs-full_NotionalAmount_019c0020-9b5e-7aef-99f7-03006d0a6187" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_GainsLossesOnChangeInFairValueOfDerivatives_019c0020-9b5e-7fb0-9ad0-af5c370f9612" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_GainsLossesOnChangeInFairValueOfDerivatives"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfFinancialInstrumentsLineItems_019c0020-9b5e-7c08-961c-cbb6b011c1c2" xlink:to="loc_ifrs-full_GainsLossesOnChangeInFairValueOfDerivatives_019c0020-9b5e-7fb0-9ad0-af5c370f9612" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.titanamerica.com/role/ForeignexchangeandderivativefinancialinstrumentsDetails" xlink:type="simple" xlink:href="ttam-20251231.xsd#ForeignexchangeandderivativefinancialinstrumentsDetails"/>
  <link:definitionLink xlink:role="http://www.titanamerica.com/role/ForeignexchangeandderivativefinancialinstrumentsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfFinancialInstrumentsLineItems_019c0020-9b5e-73d3-9c25-23670248639e" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfFinancialInstrumentsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfFinancialInstrumentsTable_019c0020-9b5e-711d-bfb5-52d2b3d5d85d" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfFinancialInstrumentsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfFinancialInstrumentsLineItems_019c0020-9b5e-73d3-9c25-23670248639e" xlink:to="loc_ifrs-full_DisclosureOfFinancialInstrumentsTable_019c0020-9b5e-711d-bfb5-52d2b3d5d85d" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_HedgingInstrumentsAxis_019c0020-9b5e-7235-8f74-859b14ae399e" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_HedgingInstrumentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfFinancialInstrumentsTable_019c0020-9b5e-711d-bfb5-52d2b3d5d85d" xlink:to="loc_ifrs-full_HedgingInstrumentsAxis_019c0020-9b5e-7235-8f74-859b14ae399e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_HedgingInstrumentsDomain_019c0020-9b5e-7235-8f74-859b14ae399e_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_HedgingInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_HedgingInstrumentsAxis_019c0020-9b5e-7235-8f74-859b14ae399e" xlink:to="loc_ifrs-full_HedgingInstrumentsDomain_019c0020-9b5e-7235-8f74-859b14ae399e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_HedgingInstrumentsDomain_019c0020-9b5e-73ae-8ca0-8b893c9361f7" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_HedgingInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_HedgingInstrumentsAxis_019c0020-9b5e-7235-8f74-859b14ae399e" xlink:to="loc_ifrs-full_HedgingInstrumentsDomain_019c0020-9b5e-73ae-8ca0-8b893c9361f7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_CurrencyInterestRateSwapsEconomicHedgeMember_019c0020-9b5e-70d5-8ac7-13987aeb24d1" xlink:href="ttam-20251231.xsd#ttam_CurrencyInterestRateSwapsEconomicHedgeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_HedgingInstrumentsDomain_019c0020-9b5e-73ae-8ca0-8b893c9361f7" xlink:to="loc_ttam_CurrencyInterestRateSwapsEconomicHedgeMember_019c0020-9b5e-70d5-8ac7-13987aeb24d1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_InterestRateSwapContractMember_019c0020-9b5e-7a5f-beeb-8cb0f0de220b" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_InterestRateSwapContractMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_HedgingInstrumentsDomain_019c0020-9b5e-73ae-8ca0-8b893c9361f7" xlink:to="loc_ifrs-full_InterestRateSwapContractMember_019c0020-9b5e-7a5f-beeb-8cb0f0de220b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_ForeignExchangeForwardsEconomicHedgeMember_019c0020-9b5e-7d76-9303-2d9ad3bc3452" xlink:href="ttam-20251231.xsd#ttam_ForeignExchangeForwardsEconomicHedgeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_HedgingInstrumentsDomain_019c0020-9b5e-73ae-8ca0-8b893c9361f7" xlink:to="loc_ttam_ForeignExchangeForwardsEconomicHedgeMember_019c0020-9b5e-7d76-9303-2d9ad3bc3452" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_NaturalGasFuturesCashFlowHedgeMember_019c0020-9b5e-757b-a747-cd62cf84723f" xlink:href="ttam-20251231.xsd#ttam_NaturalGasFuturesCashFlowHedgeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_HedgingInstrumentsDomain_019c0020-9b5e-73ae-8ca0-8b893c9361f7" xlink:to="loc_ttam_NaturalGasFuturesCashFlowHedgeMember_019c0020-9b5e-757b-a747-cd62cf84723f" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DerivativeFinancialLiabilities_019c0020-9b5e-7188-9655-0b1b9cb33dc0" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DerivativeFinancialLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfFinancialInstrumentsLineItems_019c0020-9b5e-73d3-9c25-23670248639e" xlink:to="loc_ifrs-full_DerivativeFinancialLiabilities_019c0020-9b5e-7188-9655-0b1b9cb33dc0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DerivativeFinancialAssets_019c0020-9b5e-787c-973f-00aedf50ff12" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DerivativeFinancialAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfFinancialInstrumentsLineItems_019c0020-9b5e-73d3-9c25-23670248639e" xlink:to="loc_ifrs-full_DerivativeFinancialAssets_019c0020-9b5e-787c-973f-00aedf50ff12" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_DerivativeFinancialInstrumentsCreditSupportPayments_019c0020-9b5e-7bee-988f-7d8222c47e50" xlink:href="ttam-20251231.xsd#ttam_DerivativeFinancialInstrumentsCreditSupportPayments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfFinancialInstrumentsLineItems_019c0020-9b5e-73d3-9c25-23670248639e" xlink:to="loc_ttam_DerivativeFinancialInstrumentsCreditSupportPayments_019c0020-9b5e-7bee-988f-7d8222c47e50" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_NetDerivativeFinancialLiabilities_019c0020-9b5e-731f-a7f0-5606d4dd62d8" xlink:href="ttam-20251231.xsd#ttam_NetDerivativeFinancialLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfFinancialInstrumentsLineItems_019c0020-9b5e-73d3-9c25-23670248639e" xlink:to="loc_ttam_NetDerivativeFinancialLiabilities_019c0020-9b5e-731f-a7f0-5606d4dd62d8" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_NetDerivativeFinancialAssets_019c0020-9b5e-710a-a3e7-0eab446b81b7" xlink:href="ttam-20251231.xsd#ttam_NetDerivativeFinancialAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfFinancialInstrumentsLineItems_019c0020-9b5e-73d3-9c25-23670248639e" xlink:to="loc_ttam_NetDerivativeFinancialAssets_019c0020-9b5e-710a-a3e7-0eab446b81b7" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_GainsLossesOnChangeInFairValueOfDerivatives_019c0020-9b5e-7afb-ad6c-a570ccc66a67" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_GainsLossesOnChangeInFairValueOfDerivatives"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfFinancialInstrumentsLineItems_019c0020-9b5e-73d3-9c25-23670248639e" xlink:to="loc_ifrs-full_GainsLossesOnChangeInFairValueOfDerivatives_019c0020-9b5e-7afb-ad6c-a570ccc66a67" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_GainLossOnDerivativeFinancialInstrumentsAsMeasuredAtFairValueThroughOtherComprehensiveIncome_019c0020-9b5e-7658-b03e-01b193738a57" xlink:href="ttam-20251231.xsd#ttam_GainLossOnDerivativeFinancialInstrumentsAsMeasuredAtFairValueThroughOtherComprehensiveIncome"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfFinancialInstrumentsLineItems_019c0020-9b5e-73d3-9c25-23670248639e" xlink:to="loc_ttam_GainLossOnDerivativeFinancialInstrumentsAsMeasuredAtFairValueThroughOtherComprehensiveIncome_019c0020-9b5e-7658-b03e-01b193738a57" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_GainLossOnDerivativeFinancialInstrumentsAsMeasuredAtFairValueThroughFinanceCosts_019c0020-9b5e-7988-b989-bb73044a0b83" xlink:href="ttam-20251231.xsd#ttam_GainLossOnDerivativeFinancialInstrumentsAsMeasuredAtFairValueThroughFinanceCosts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfFinancialInstrumentsLineItems_019c0020-9b5e-73d3-9c25-23670248639e" xlink:to="loc_ttam_GainLossOnDerivativeFinancialInstrumentsAsMeasuredAtFairValueThroughFinanceCosts_019c0020-9b5e-7988-b989-bb73044a0b83" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_SettlementOfDerivativeFinancialInstruments_019c0020-9b5e-7145-aa87-0b5f7e67adc4" xlink:href="ttam-20251231.xsd#ttam_SettlementOfDerivativeFinancialInstruments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfFinancialInstrumentsLineItems_019c0020-9b5e-73d3-9c25-23670248639e" xlink:to="loc_ttam_SettlementOfDerivativeFinancialInstruments_019c0020-9b5e-7145-aa87-0b5f7e67adc4" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_DerivativeFinancialLiabilitiesCreditSupportReceipts_019c0020-9b5e-7a1d-b173-661e84be0b17" xlink:href="ttam-20251231.xsd#ttam_DerivativeFinancialLiabilitiesCreditSupportReceipts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfFinancialInstrumentsLineItems_019c0020-9b5e-73d3-9c25-23670248639e" xlink:to="loc_ttam_DerivativeFinancialLiabilitiesCreditSupportReceipts_019c0020-9b5e-7a1d-b173-661e84be0b17" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DerivativeFinancialLiabilities_019c0020-9b5e-73b2-afeb-3e770675e5c8" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DerivativeFinancialLiabilities"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DerivativeFinancialAssets_019c0020-9b5e-7ce7-83b7-2c2dd86f63d8" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DerivativeFinancialAssets"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_DerivativeFinancialInstrumentsCreditSupportPayments_019c0020-9b5e-7966-9d5e-49b41ca4c82b" xlink:href="ttam-20251231.xsd#ttam_DerivativeFinancialInstrumentsCreditSupportPayments"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_NetDerivativeFinancialLiabilities_019c0020-9b5e-7420-9611-a91569e1ad8f" xlink:href="ttam-20251231.xsd#ttam_NetDerivativeFinancialLiabilities"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_NetDerivativeFinancialAssets_019c0020-9b5e-797e-9aad-7ad83a0bdae2" xlink:href="ttam-20251231.xsd#ttam_NetDerivativeFinancialAssets"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.titanamerica.com/role/PropertyplantequipmentandmineraldepositsDetails" xlink:type="simple" xlink:href="ttam-20251231.xsd#PropertyplantequipmentandmineraldepositsDetails"/>
  <link:definitionLink xlink:role="http://www.titanamerica.com/role/PropertyplantequipmentandmineraldepositsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems_019c0020-9b5e-778a-bee7-0f3651f5edd7" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentTable_019c0020-9b5e-7bbe-a6ac-bc3e9a27a0f3" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfPropertyPlantAndEquipmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems_019c0020-9b5e-778a-bee7-0f3651f5edd7" xlink:to="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentTable_019c0020-9b5e-7bbe-a6ac-bc3e9a27a0f3" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis_019c0020-9b5e-7faf-be3f-05ab5c6586f4" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentTable_019c0020-9b5e-7bbe-a6ac-bc3e9a27a0f3" xlink:to="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis_019c0020-9b5e-7faf-be3f-05ab5c6586f4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain_019c0020-9b5e-7faf-be3f-05ab5c6586f4_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis_019c0020-9b5e-7faf-be3f-05ab5c6586f4" xlink:to="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain_019c0020-9b5e-7faf-be3f-05ab5c6586f4_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain_019c0020-9b5e-78c2-a19d-2525f388d7f2" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis_019c0020-9b5e-7faf-be3f-05ab5c6586f4" xlink:to="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain_019c0020-9b5e-78c2-a19d-2525f388d7f2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_QuarriesMember_019c0020-9b5e-737f-b196-6eedd8dc78a8" xlink:href="ttam-20251231.xsd#ttam_QuarriesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain_019c0020-9b5e-78c2-a19d-2525f388d7f2" xlink:to="loc_ttam_QuarriesMember_019c0020-9b5e-737f-b196-6eedd8dc78a8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_LandAndLandImprovements1Member_019c0020-9b5e-79a7-af60-c9dc2987d7c4" xlink:href="ttam-20251231.xsd#ttam_LandAndLandImprovements1Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain_019c0020-9b5e-78c2-a19d-2525f388d7f2" xlink:to="loc_ttam_LandAndLandImprovements1Member_019c0020-9b5e-79a7-af60-c9dc2987d7c4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BuildingsMember_019c0020-9b5e-7817-b86b-451d7853ef8d" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BuildingsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain_019c0020-9b5e-78c2-a19d-2525f388d7f2" xlink:to="loc_ifrs-full_BuildingsMember_019c0020-9b5e-7817-b86b-451d7853ef8d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_MachineryAndEquipment1Member_019c0020-9b5e-7a06-9a40-ed157299ba41" xlink:href="ttam-20251231.xsd#ttam_MachineryAndEquipment1Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain_019c0020-9b5e-78c2-a19d-2525f388d7f2" xlink:to="loc_ttam_MachineryAndEquipment1Member_019c0020-9b5e-7a06-9a40-ed157299ba41" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_MotorVehiclesMember_019c0020-9b5e-7b57-9254-51507180a9ab" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_MotorVehiclesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain_019c0020-9b5e-78c2-a19d-2525f388d7f2" xlink:to="loc_ifrs-full_MotorVehiclesMember_019c0020-9b5e-7b57-9254-51507180a9ab" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_FixturesAndFittingsMember_019c0020-9b5e-73ae-8ccf-14409c535b36" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_FixturesAndFittingsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain_019c0020-9b5e-78c2-a19d-2525f388d7f2" xlink:to="loc_ifrs-full_FixturesAndFittingsMember_019c0020-9b5e-73ae-8ccf-14409c535b36" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ConstructionInProgressMember_019c0020-9b5e-7639-a624-4189a3712631" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ConstructionInProgressMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain_019c0020-9b5e-78c2-a19d-2525f388d7f2" xlink:to="loc_ifrs-full_ConstructionInProgressMember_019c0020-9b5e-7639-a624-4189a3712631" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis_019c0020-9b5e-7154-9853-4729c7dfab07" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentTable_019c0020-9b5e-7bbe-a6ac-bc3e9a27a0f3" xlink:to="loc_ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis_019c0020-9b5e-7154-9853-4729c7dfab07" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CarryingAmountMember_019c0020-9b5e-7154-9853-4729c7dfab07_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CarryingAmountMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis_019c0020-9b5e-7154-9853-4729c7dfab07" xlink:to="loc_ifrs-full_CarryingAmountMember_019c0020-9b5e-7154-9853-4729c7dfab07_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CarryingAmountMember_019c0020-9b5e-7c41-8186-a1110b26e17e" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CarryingAmountMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis_019c0020-9b5e-7154-9853-4729c7dfab07" xlink:to="loc_ifrs-full_CarryingAmountMember_019c0020-9b5e-7c41-8186-a1110b26e17e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_GrossCarryingAmountMember_019c0020-9b5e-71b9-91fb-ff94f40857cc" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_GrossCarryingAmountMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_CarryingAmountMember_019c0020-9b5e-7c41-8186-a1110b26e17e" xlink:to="loc_ifrs-full_GrossCarryingAmountMember_019c0020-9b5e-71b9-91fb-ff94f40857cc" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AccumulatedDepreciationAndAmortisationMember_019c0020-9b5e-7b22-8cb7-da83d5f53d32" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_AccumulatedDepreciationAndAmortisationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_CarryingAmountMember_019c0020-9b5e-7c41-8186-a1110b26e17e" xlink:to="loc_ifrs-full_AccumulatedDepreciationAndAmortisationMember_019c0020-9b5e-7b22-8cb7-da83d5f53d32" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AccumulatedImpairmentMember_019c0020-9b5e-7262-b0d8-4fc416443513" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_AccumulatedImpairmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_CarryingAmountMember_019c0020-9b5e-7c41-8186-a1110b26e17e" xlink:to="loc_ifrs-full_AccumulatedImpairmentMember_019c0020-9b5e-7262-b0d8-4fc416443513" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ReconciliationOfChangesInPropertyPlantAndEquipmentAbstract_019c0020-9b5e-7fed-96f4-2548d19e1f80" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ReconciliationOfChangesInPropertyPlantAndEquipmentAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems_019c0020-9b5e-778a-bee7-0f3651f5edd7" xlink:to="loc_ifrs-full_ReconciliationOfChangesInPropertyPlantAndEquipmentAbstract_019c0020-9b5e-7fed-96f4-2548d19e1f80" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_PropertyPlantAndEquipment_019c0020-9b5e-78ed-a491-b4df3682a18f" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_PropertyPlantAndEquipment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ReconciliationOfChangesInPropertyPlantAndEquipmentAbstract_019c0020-9b5e-7fed-96f4-2548d19e1f80" xlink:to="loc_ifrs-full_PropertyPlantAndEquipment_019c0020-9b5e-78ed-a491-b4df3682a18f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AdditionsOtherThanThroughBusinessCombinationsPropertyPlantAndEquipment_019c0020-9b5e-7fb6-882a-9f4560b85ad8" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_AdditionsOtherThanThroughBusinessCombinationsPropertyPlantAndEquipment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ReconciliationOfChangesInPropertyPlantAndEquipmentAbstract_019c0020-9b5e-7fed-96f4-2548d19e1f80" xlink:to="loc_ifrs-full_AdditionsOtherThanThroughBusinessCombinationsPropertyPlantAndEquipment_019c0020-9b5e-7fb6-882a-9f4560b85ad8" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisposalsPropertyPlantAndEquipment_019c0020-9b5e-7549-bd0e-bc8ec4a5a87a" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisposalsPropertyPlantAndEquipment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ReconciliationOfChangesInPropertyPlantAndEquipmentAbstract_019c0020-9b5e-7fed-96f4-2548d19e1f80" xlink:to="loc_ifrs-full_DisposalsPropertyPlantAndEquipment_019c0020-9b5e-7549-bd0e-bc8ec4a5a87a" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_IncreaseDecreaseThroughTransfersPropertyPlantAndEquipment_019c0020-9b5e-7aef-8378-4c6388f3f4d4" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_IncreaseDecreaseThroughTransfersPropertyPlantAndEquipment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ReconciliationOfChangesInPropertyPlantAndEquipmentAbstract_019c0020-9b5e-7fed-96f4-2548d19e1f80" xlink:to="loc_ifrs-full_IncreaseDecreaseThroughTransfersPropertyPlantAndEquipment_019c0020-9b5e-7aef-8378-4c6388f3f4d4" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_AdjustmentsForProvisionsPropertyPlantAndEquipment_019c0020-9b5e-7aeb-9c6e-f653bfac64d4" xlink:href="ttam-20251231.xsd#ttam_AdjustmentsForProvisionsPropertyPlantAndEquipment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ReconciliationOfChangesInPropertyPlantAndEquipmentAbstract_019c0020-9b5e-7fed-96f4-2548d19e1f80" xlink:to="loc_ttam_AdjustmentsForProvisionsPropertyPlantAndEquipment_019c0020-9b5e-7aeb-9c6e-f653bfac64d4" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_CapitalizedInterestPropertyPlantAndEquipment_019c0020-9b5e-7bef-85ad-0197ce33b044" xlink:href="ttam-20251231.xsd#ttam_CapitalizedInterestPropertyPlantAndEquipment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ReconciliationOfChangesInPropertyPlantAndEquipmentAbstract_019c0020-9b5e-7fed-96f4-2548d19e1f80" xlink:to="loc_ttam_CapitalizedInterestPropertyPlantAndEquipment_019c0020-9b5e-7bef-85ad-0197ce33b044" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DepreciationPropertyPlantAndEquipment_019c0020-9b5e-7ca6-8f5a-762be8754e36" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DepreciationPropertyPlantAndEquipment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ReconciliationOfChangesInPropertyPlantAndEquipmentAbstract_019c0020-9b5e-7fed-96f4-2548d19e1f80" xlink:to="loc_ifrs-full_DepreciationPropertyPlantAndEquipment_019c0020-9b5e-7ca6-8f5a-762be8754e36" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_DecreaseThroughDispositionOfSegmentPropertyPlantAndEquipment_019cd7ff-b4cd-7add-bc64-aa5ac8cfaaee" xlink:href="ttam-20251231.xsd#ttam_DecreaseThroughDispositionOfSegmentPropertyPlantAndEquipment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ReconciliationOfChangesInPropertyPlantAndEquipmentAbstract_019c0020-9b5e-7fed-96f4-2548d19e1f80" xlink:to="loc_ttam_DecreaseThroughDispositionOfSegmentPropertyPlantAndEquipment_019cd7ff-b4cd-7add-bc64-aa5ac8cfaaee" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_PropertyPlantAndEquipment_019c0020-9b5e-75b9-850e-79d78471e808" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_PropertyPlantAndEquipment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_AccrualForCapitalProjectsPropertyPlantAndEquipment_019c0020-9b5e-767f-8598-76e1cbad39e5" xlink:href="ttam-20251231.xsd#ttam_AccrualForCapitalProjectsPropertyPlantAndEquipment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems_019c0020-9b5e-778a-bee7-0f3651f5edd7" xlink:to="loc_ttam_AccrualForCapitalProjectsPropertyPlantAndEquipment_019c0020-9b5e-767f-8598-76e1cbad39e5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_CapitalProjectsCapitalizationRate_019c0020-9b5e-7d17-ae98-c70c516c67a9" xlink:href="ttam-20251231.xsd#ttam_CapitalProjectsCapitalizationRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems_019c0020-9b5e-778a-bee7-0f3651f5edd7" xlink:to="loc_ttam_CapitalProjectsCapitalizationRate_019c0020-9b5e-7d17-ae98-c70c516c67a9" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.titanamerica.com/role/RightofuseassetsandleaseliabilitiesDisclosureofLeaseInformationRelatedtoStatementofFinancialPositionDetails" xlink:type="simple" xlink:href="ttam-20251231.xsd#RightofuseassetsandleaseliabilitiesDisclosureofLeaseInformationRelatedtoStatementofFinancialPositionDetails"/>
  <link:definitionLink xlink:role="http://www.titanamerica.com/role/RightofuseassetsandleaseliabilitiesDisclosureofLeaseInformationRelatedtoStatementofFinancialPositionDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfQuantitativeInformationAboutRightofuseAssetsLineItems_019c0020-9b5e-7c23-b7c4-3013aa8ee8cf" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfQuantitativeInformationAboutRightofuseAssetsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfQuantitativeInformationAboutRightofuseAssetsTable_019c0020-9b5e-7b0e-85f1-1c638fb0efc9" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfQuantitativeInformationAboutRightofuseAssetsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfQuantitativeInformationAboutRightofuseAssetsLineItems_019c0020-9b5e-7c23-b7c4-3013aa8ee8cf" xlink:to="loc_ifrs-full_DisclosureOfQuantitativeInformationAboutRightofuseAssetsTable_019c0020-9b5e-7b0e-85f1-1c638fb0efc9" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfAssetsAxis_019c0020-9b5e-74b4-bbfa-a6d73f72dbd7" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfAssetsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfQuantitativeInformationAboutRightofuseAssetsTable_019c0020-9b5e-7b0e-85f1-1c638fb0efc9" xlink:to="loc_ifrs-full_ClassesOfAssetsAxis_019c0020-9b5e-74b4-bbfa-a6d73f72dbd7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfAssetsDomain_019c0020-9b5e-74b4-bbfa-a6d73f72dbd7_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfAssetsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_ClassesOfAssetsAxis_019c0020-9b5e-74b4-bbfa-a6d73f72dbd7" xlink:to="loc_ifrs-full_ClassesOfAssetsDomain_019c0020-9b5e-74b4-bbfa-a6d73f72dbd7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfAssetsDomain_019c0020-9b5e-7b82-a596-a304bd09e624" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfAssetsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_ClassesOfAssetsAxis_019c0020-9b5e-74b4-bbfa-a6d73f72dbd7" xlink:to="loc_ifrs-full_ClassesOfAssetsDomain_019c0020-9b5e-7b82-a596-a304bd09e624" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_LandAndLandImprovements1Member_019c0020-9b5e-70d9-842b-68f495328b4c" xlink:href="ttam-20251231.xsd#ttam_LandAndLandImprovements1Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfAssetsDomain_019c0020-9b5e-7b82-a596-a304bd09e624" xlink:to="loc_ttam_LandAndLandImprovements1Member_019c0020-9b5e-70d9-842b-68f495328b4c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BuildingsMember_019c0020-9b5e-7a1a-b647-59ca07883492" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BuildingsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfAssetsDomain_019c0020-9b5e-7b82-a596-a304bd09e624" xlink:to="loc_ifrs-full_BuildingsMember_019c0020-9b5e-7a1a-b647-59ca07883492" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_MachineryAndEquipment1Member_019c0020-9b5e-77c7-bbc9-eecfdd95ff47" xlink:href="ttam-20251231.xsd#ttam_MachineryAndEquipment1Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfAssetsDomain_019c0020-9b5e-7b82-a596-a304bd09e624" xlink:to="loc_ttam_MachineryAndEquipment1Member_019c0020-9b5e-77c7-bbc9-eecfdd95ff47" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_MotorVehiclesMember_019c0020-9b5e-7ec7-a4b5-ccaa2e7902bf" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_MotorVehiclesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfAssetsDomain_019c0020-9b5e-7b82-a596-a304bd09e624" xlink:to="loc_ifrs-full_MotorVehiclesMember_019c0020-9b5e-7ec7-a4b5-ccaa2e7902bf" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RightofuseAssets_019c0020-9b5e-717e-8a11-9431ac5f7ace" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_RightofuseAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfQuantitativeInformationAboutRightofuseAssetsLineItems_019c0020-9b5e-7c23-b7c4-3013aa8ee8cf" xlink:to="loc_ifrs-full_RightofuseAssets_019c0020-9b5e-717e-8a11-9431ac5f7ace" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LeaseLiabilitiesAbstract_019c0020-9b5e-7d09-a46f-9e3b29467e01" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_LeaseLiabilitiesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfQuantitativeInformationAboutRightofuseAssetsLineItems_019c0020-9b5e-7c23-b7c4-3013aa8ee8cf" xlink:to="loc_ifrs-full_LeaseLiabilitiesAbstract_019c0020-9b5e-7d09-a46f-9e3b29467e01" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CurrentLeaseLiabilities_019c0020-9b5e-7618-8ccd-bd3d2f8a84ab" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CurrentLeaseLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_LeaseLiabilitiesAbstract_019c0020-9b5e-7d09-a46f-9e3b29467e01" xlink:to="loc_ifrs-full_CurrentLeaseLiabilities_019c0020-9b5e-7618-8ccd-bd3d2f8a84ab" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NoncurrentLeaseLiabilities_019c0020-9b5e-7d38-979c-581a3a94d1e5" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NoncurrentLeaseLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_LeaseLiabilitiesAbstract_019c0020-9b5e-7d09-a46f-9e3b29467e01" xlink:to="loc_ifrs-full_NoncurrentLeaseLiabilities_019c0020-9b5e-7d38-979c-581a3a94d1e5" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LeaseLiabilities_019c0020-9b5e-793a-9f54-e62c8df6d709" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_LeaseLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_LeaseLiabilitiesAbstract_019c0020-9b5e-7d09-a46f-9e3b29467e01" xlink:to="loc_ifrs-full_LeaseLiabilities_019c0020-9b5e-793a-9f54-e62c8df6d709" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.titanamerica.com/role/RightofuseassetsandleaseliabilitiesDisclosureofLeaseExpenseDetails" xlink:type="simple" xlink:href="ttam-20251231.xsd#RightofuseassetsandleaseliabilitiesDisclosureofLeaseExpenseDetails"/>
  <link:definitionLink xlink:role="http://www.titanamerica.com/role/RightofuseassetsandleaseliabilitiesDisclosureofLeaseExpenseDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfQuantitativeInformationAboutRightofuseAssetsLineItems_019c0020-9b5e-76bf-bdf5-f5c7dd24c5ba" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfQuantitativeInformationAboutRightofuseAssetsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfQuantitativeInformationAboutRightofuseAssetsTable_019c0020-9b5e-744c-9bc2-b53d148bac42" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfQuantitativeInformationAboutRightofuseAssetsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfQuantitativeInformationAboutRightofuseAssetsLineItems_019c0020-9b5e-76bf-bdf5-f5c7dd24c5ba" xlink:to="loc_ifrs-full_DisclosureOfQuantitativeInformationAboutRightofuseAssetsTable_019c0020-9b5e-744c-9bc2-b53d148bac42" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfAssetsAxis_019c0020-9b5e-7df8-86dc-6fc6ac9945e2" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfAssetsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfQuantitativeInformationAboutRightofuseAssetsTable_019c0020-9b5e-744c-9bc2-b53d148bac42" xlink:to="loc_ifrs-full_ClassesOfAssetsAxis_019c0020-9b5e-7df8-86dc-6fc6ac9945e2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfAssetsDomain_019c0020-9b5e-7df8-86dc-6fc6ac9945e2_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfAssetsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_ClassesOfAssetsAxis_019c0020-9b5e-7df8-86dc-6fc6ac9945e2" xlink:to="loc_ifrs-full_ClassesOfAssetsDomain_019c0020-9b5e-7df8-86dc-6fc6ac9945e2_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfAssetsDomain_019c0020-9b5e-711b-8a5b-6fd072968d2e" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfAssetsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_ClassesOfAssetsAxis_019c0020-9b5e-7df8-86dc-6fc6ac9945e2" xlink:to="loc_ifrs-full_ClassesOfAssetsDomain_019c0020-9b5e-711b-8a5b-6fd072968d2e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_LandAndLandImprovements1Member_019c0020-9b5e-728e-bd5b-fbb35d3a8cfa" xlink:href="ttam-20251231.xsd#ttam_LandAndLandImprovements1Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfAssetsDomain_019c0020-9b5e-711b-8a5b-6fd072968d2e" xlink:to="loc_ttam_LandAndLandImprovements1Member_019c0020-9b5e-728e-bd5b-fbb35d3a8cfa" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BuildingsMember_019c0020-9b5e-7490-bd0b-af74f92ca179" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BuildingsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfAssetsDomain_019c0020-9b5e-711b-8a5b-6fd072968d2e" xlink:to="loc_ifrs-full_BuildingsMember_019c0020-9b5e-7490-bd0b-af74f92ca179" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_MachineryAndEquipment1Member_019c0020-9b5e-77a5-8341-ee0a116e2871" xlink:href="ttam-20251231.xsd#ttam_MachineryAndEquipment1Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfAssetsDomain_019c0020-9b5e-711b-8a5b-6fd072968d2e" xlink:to="loc_ttam_MachineryAndEquipment1Member_019c0020-9b5e-77a5-8341-ee0a116e2871" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_MotorVehiclesMember_019c0020-9b5e-7f73-994d-a0be64ad893b" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_MotorVehiclesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfAssetsDomain_019c0020-9b5e-711b-8a5b-6fd072968d2e" xlink:to="loc_ifrs-full_MotorVehiclesMember_019c0020-9b5e-7f73-994d-a0be64ad893b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DepreciationRightofuseAssets_019c0020-9b5e-7879-850e-a6a78d539a79" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DepreciationRightofuseAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfQuantitativeInformationAboutRightofuseAssetsLineItems_019c0020-9b5e-76bf-bdf5-f5c7dd24c5ba" xlink:to="loc_ifrs-full_DepreciationRightofuseAssets_019c0020-9b5e-7879-850e-a6a78d539a79" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_InterestExpenseOnLeaseLiabilities_019c0020-9b5e-7889-a781-ea52bf948e41" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_InterestExpenseOnLeaseLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfQuantitativeInformationAboutRightofuseAssetsLineItems_019c0020-9b5e-76bf-bdf5-f5c7dd24c5ba" xlink:to="loc_ifrs-full_InterestExpenseOnLeaseLiabilities_019c0020-9b5e-7889-a781-ea52bf948e41" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ExpenseRelatingToShorttermLeasesForWhichRecognitionExemptionHasBeenUsed_019c0020-9b5e-78c0-b5b2-a6f855f2eb87" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ExpenseRelatingToShorttermLeasesForWhichRecognitionExemptionHasBeenUsed"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfQuantitativeInformationAboutRightofuseAssetsLineItems_019c0020-9b5e-76bf-bdf5-f5c7dd24c5ba" xlink:to="loc_ifrs-full_ExpenseRelatingToShorttermLeasesForWhichRecognitionExemptionHasBeenUsed_019c0020-9b5e-78c0-b5b2-a6f855f2eb87" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ExpenseRelatingToLeasesOfLowvalueAssetsForWhichRecognitionExemptionHasBeenUsed_019c0020-9b5e-764f-9795-cccd5887a499" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ExpenseRelatingToLeasesOfLowvalueAssetsForWhichRecognitionExemptionHasBeenUsed"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfQuantitativeInformationAboutRightofuseAssetsLineItems_019c0020-9b5e-76bf-bdf5-f5c7dd24c5ba" xlink:to="loc_ifrs-full_ExpenseRelatingToLeasesOfLowvalueAssetsForWhichRecognitionExemptionHasBeenUsed_019c0020-9b5e-764f-9795-cccd5887a499" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.titanamerica.com/role/IntangibleassetsDetails" xlink:type="simple" xlink:href="ttam-20251231.xsd#IntangibleassetsDetails"/>
  <link:definitionLink xlink:role="http://www.titanamerica.com/role/IntangibleassetsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfIntangibleAssetsLineItems_019c0020-9b5e-79b3-880b-5ae1ae24ed68" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfIntangibleAssetsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfIntangibleAssetsTable_019c0020-9b5e-7531-81f9-feeea3761086" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfIntangibleAssetsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfIntangibleAssetsLineItems_019c0020-9b5e-79b3-880b-5ae1ae24ed68" xlink:to="loc_ifrs-full_DisclosureOfIntangibleAssetsTable_019c0020-9b5e-7531-81f9-feeea3761086" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis_019c0020-9b5e-7f6f-9f5c-e8d21a2b85c6" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfIntangibleAssetsTable_019c0020-9b5e-7531-81f9-feeea3761086" xlink:to="loc_ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis_019c0020-9b5e-7f6f-9f5c-e8d21a2b85c6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CarryingAmountMember_019c0020-9b5e-7f6f-9f5c-e8d21a2b85c6_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CarryingAmountMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis_019c0020-9b5e-7f6f-9f5c-e8d21a2b85c6" xlink:to="loc_ifrs-full_CarryingAmountMember_019c0020-9b5e-7f6f-9f5c-e8d21a2b85c6_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CarryingAmountMember_019c0020-9b5e-7fff-9f55-6c8b38c053c7" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CarryingAmountMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis_019c0020-9b5e-7f6f-9f5c-e8d21a2b85c6" xlink:to="loc_ifrs-full_CarryingAmountMember_019c0020-9b5e-7fff-9f55-6c8b38c053c7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_GrossCarryingAmountMember_019c0020-9b5e-7d2c-8eb3-80657ec2d7ad" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_GrossCarryingAmountMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_CarryingAmountMember_019c0020-9b5e-7fff-9f55-6c8b38c053c7" xlink:to="loc_ifrs-full_GrossCarryingAmountMember_019c0020-9b5e-7d2c-8eb3-80657ec2d7ad" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AccumulatedDepreciationAndAmortisationMember_019c0020-9b5e-76bf-8e50-d0100d815607" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_AccumulatedDepreciationAndAmortisationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_CarryingAmountMember_019c0020-9b5e-7fff-9f55-6c8b38c053c7" xlink:to="loc_ifrs-full_AccumulatedDepreciationAndAmortisationMember_019c0020-9b5e-76bf-8e50-d0100d815607" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillAxis_019c0020-9b5e-7351-8f86-2618eff8c256" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfIntangibleAssetsTable_019c0020-9b5e-7531-81f9-feeea3761086" xlink:to="loc_ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillAxis_019c0020-9b5e-7351-8f86-2618eff8c256" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillDomain_019c0020-9b5e-7351-8f86-2618eff8c256_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillAxis_019c0020-9b5e-7351-8f86-2618eff8c256" xlink:to="loc_ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillDomain_019c0020-9b5e-7351-8f86-2618eff8c256_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillDomain_019c0020-9b5e-74b9-8e58-e03bd51d610b" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillAxis_019c0020-9b5e-7351-8f86-2618eff8c256" xlink:to="loc_ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillDomain_019c0020-9b5e-74b9-8e58-e03bd51d610b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CustomerrelatedIntangibleAssetsMember_019c0020-9b5e-792c-a39e-c8c31e19850b" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CustomerrelatedIntangibleAssetsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillDomain_019c0020-9b5e-74b9-8e58-e03bd51d610b" xlink:to="loc_ifrs-full_CustomerrelatedIntangibleAssetsMember_019c0020-9b5e-792c-a39e-c8c31e19850b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BrandNamesMember_019c0020-9b5e-7d1c-a872-57ba44b67ee3" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BrandNamesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillDomain_019c0020-9b5e-74b9-8e58-e03bd51d610b" xlink:to="loc_ifrs-full_BrandNamesMember_019c0020-9b5e-7d1c-a872-57ba44b67ee3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ComputerSoftwareMember_019c0020-9b5e-7dd7-a199-5d314dbf049c" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ComputerSoftwareMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillDomain_019c0020-9b5e-74b9-8e58-e03bd51d610b" xlink:to="loc_ifrs-full_ComputerSoftwareMember_019c0020-9b5e-7dd7-a199-5d314dbf049c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_OtherIntangibleAssetsMember_019c0020-9b5e-77dd-89d4-b9eed2b3ee86" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_OtherIntangibleAssetsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillDomain_019c0020-9b5e-74b9-8e58-e03bd51d610b" xlink:to="loc_ifrs-full_OtherIntangibleAssetsMember_019c0020-9b5e-77dd-89d4-b9eed2b3ee86" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ReconciliationOfChangesInIntangibleAssetsOtherThanGoodwillAbstract_019c0020-9b5e-7a1e-9e2a-98fff63e614f" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ReconciliationOfChangesInIntangibleAssetsOtherThanGoodwillAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfIntangibleAssetsLineItems_019c0020-9b5e-79b3-880b-5ae1ae24ed68" xlink:to="loc_ifrs-full_ReconciliationOfChangesInIntangibleAssetsOtherThanGoodwillAbstract_019c0020-9b5e-7a1e-9e2a-98fff63e614f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_IntangibleAssetsOtherThanGoodwill_019c0020-9b5e-75c2-826e-051f142f3f0a" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_IntangibleAssetsOtherThanGoodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ReconciliationOfChangesInIntangibleAssetsOtherThanGoodwillAbstract_019c0020-9b5e-7a1e-9e2a-98fff63e614f" xlink:to="loc_ifrs-full_IntangibleAssetsOtherThanGoodwill_019c0020-9b5e-75c2-826e-051f142f3f0a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AdditionsOtherThanThroughBusinessCombinationsIntangibleAssetsOtherThanGoodwill_019c0020-9b5e-742a-b558-3de2b4db818c" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_AdditionsOtherThanThroughBusinessCombinationsIntangibleAssetsOtherThanGoodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ReconciliationOfChangesInIntangibleAssetsOtherThanGoodwillAbstract_019c0020-9b5e-7a1e-9e2a-98fff63e614f" xlink:to="loc_ifrs-full_AdditionsOtherThanThroughBusinessCombinationsIntangibleAssetsOtherThanGoodwill_019c0020-9b5e-742a-b558-3de2b4db818c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisposalsIntangibleAssetsOtherThanGoodwill_019c7ffc-2677-7b1b-8f57-d6f1d867ec95" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisposalsIntangibleAssetsOtherThanGoodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ReconciliationOfChangesInIntangibleAssetsOtherThanGoodwillAbstract_019c0020-9b5e-7a1e-9e2a-98fff63e614f" xlink:to="loc_ifrs-full_DisposalsIntangibleAssetsOtherThanGoodwill_019c7ffc-2677-7b1b-8f57-d6f1d867ec95" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AmortisationIntangibleAssetsOtherThanGoodwill_019c0020-9b5e-73fc-8f9c-08a000c3a14d" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_AmortisationIntangibleAssetsOtherThanGoodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ReconciliationOfChangesInIntangibleAssetsOtherThanGoodwillAbstract_019c0020-9b5e-7a1e-9e2a-98fff63e614f" xlink:to="loc_ifrs-full_AmortisationIntangibleAssetsOtherThanGoodwill_019c0020-9b5e-73fc-8f9c-08a000c3a14d" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_IntangibleAssetsOtherThanGoodwill_019c0020-9b5e-7c9d-a2a0-f1dae7b520e2" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_IntangibleAssetsOtherThanGoodwill"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ImpairmentLossRecognisedInProfitOrLossIntangibleAssetsOtherThanGoodwill_019c0020-9b5e-7f95-b36f-cb4ad1a9d49e" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ImpairmentLossRecognisedInProfitOrLossIntangibleAssetsOtherThanGoodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfIntangibleAssetsLineItems_019c0020-9b5e-79b3-880b-5ae1ae24ed68" xlink:to="loc_ifrs-full_ImpairmentLossRecognisedInProfitOrLossIntangibleAssetsOtherThanGoodwill_019c0020-9b5e-7f95-b36f-cb4ad1a9d49e" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.titanamerica.com/role/GoodwillGoodwillandIntangibleAssetsbySegmentDetails" xlink:type="simple" xlink:href="ttam-20251231.xsd#GoodwillGoodwillandIntangibleAssetsbySegmentDetails"/>
  <link:definitionLink xlink:role="http://www.titanamerica.com/role/GoodwillGoodwillandIntangibleAssetsbySegmentDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfIntangibleAssetsLineItems_019c0020-9b5e-791a-9452-9ab9dc2bdd60" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfIntangibleAssetsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfIntangibleAssetsTable_019c0020-9b5e-7e83-a699-5874b397b3f8" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfIntangibleAssetsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfIntangibleAssetsLineItems_019c0020-9b5e-791a-9452-9ab9dc2bdd60" xlink:to="loc_ifrs-full_DisclosureOfIntangibleAssetsTable_019c0020-9b5e-7e83-a699-5874b397b3f8" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillAxis_019c0020-9b5e-7ade-9cf2-6e7df55ec7b1" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfIntangibleAssetsTable_019c0020-9b5e-7e83-a699-5874b397b3f8" xlink:to="loc_ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillAxis_019c0020-9b5e-7ade-9cf2-6e7df55ec7b1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillDomain_019c0020-9b5e-7ade-9cf2-6e7df55ec7b1_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillAxis_019c0020-9b5e-7ade-9cf2-6e7df55ec7b1" xlink:to="loc_ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillDomain_019c0020-9b5e-7ade-9cf2-6e7df55ec7b1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillDomain_019c0020-9b5e-76df-bd38-a11ea3a0da2f" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillAxis_019c0020-9b5e-7ade-9cf2-6e7df55ec7b1" xlink:to="loc_ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillDomain_019c0020-9b5e-76df-bd38-a11ea3a0da2f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_TradenamesMember_019c0020-9b5e-7ae1-8f8f-34bb26e405f0" xlink:href="ttam-20251231.xsd#ttam_TradenamesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillDomain_019c0020-9b5e-76df-bd38-a11ea3a0da2f" xlink:to="loc_ttam_TradenamesMember_019c0020-9b5e-7ae1-8f8f-34bb26e405f0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_SegmentsAxis_019c0020-9b5e-72ba-a12f-ff463b04eaba" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_SegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfIntangibleAssetsTable_019c0020-9b5e-7e83-a699-5874b397b3f8" xlink:to="loc_ifrs-full_SegmentsAxis_019c0020-9b5e-72ba-a12f-ff463b04eaba" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_SegmentsDomain_019c0020-9b5e-72ba-a12f-ff463b04eaba_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_SegmentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_SegmentsAxis_019c0020-9b5e-72ba-a12f-ff463b04eaba" xlink:to="loc_ifrs-full_SegmentsDomain_019c0020-9b5e-72ba-a12f-ff463b04eaba_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_SegmentsDomain_019c0020-9b5e-7f02-ad75-cf9d9be0bbfe" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_SegmentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_SegmentsAxis_019c0020-9b5e-72ba-a12f-ff463b04eaba" xlink:to="loc_ifrs-full_SegmentsDomain_019c0020-9b5e-7f02-ad75-cf9d9be0bbfe" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_MidAtlanticBusinessReportableSegmentMember_019c0020-9b5e-7197-9f3f-66c4d110a060" xlink:href="ttam-20251231.xsd#ttam_MidAtlanticBusinessReportableSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_SegmentsDomain_019c0020-9b5e-7f02-ad75-cf9d9be0bbfe" xlink:to="loc_ttam_MidAtlanticBusinessReportableSegmentMember_019c0020-9b5e-7197-9f3f-66c4d110a060" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_FloridaBusinessReportableSegmentMember_019c0020-9b5e-79ed-819a-ba1bbb0b6330" xlink:href="ttam-20251231.xsd#ttam_FloridaBusinessReportableSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_SegmentsDomain_019c0020-9b5e-7f02-ad75-cf9d9be0bbfe" xlink:to="loc_ttam_FloridaBusinessReportableSegmentMember_019c0020-9b5e-79ed-819a-ba1bbb0b6330" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_Goodwill_019c0020-9b5e-76e0-aa8d-092d8d57572d" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_Goodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfIntangibleAssetsLineItems_019c0020-9b5e-791a-9452-9ab9dc2bdd60" xlink:to="loc_ifrs-full_Goodwill_019c0020-9b5e-76e0-aa8d-092d8d57572d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_IntangibleAssetsOtherThanGoodwill_019c0020-9b5e-708a-a128-c5952fe24861" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_IntangibleAssetsOtherThanGoodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfIntangibleAssetsLineItems_019c0020-9b5e-791a-9452-9ab9dc2bdd60" xlink:to="loc_ifrs-full_IntangibleAssetsOtherThanGoodwill_019c0020-9b5e-708a-a128-c5952fe24861" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_IntangibleAssetsAndGoodwill_019c0020-9b5e-7481-a6a8-3d6d18aa9ff0" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_IntangibleAssetsAndGoodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfIntangibleAssetsLineItems_019c0020-9b5e-791a-9452-9ab9dc2bdd60" xlink:to="loc_ifrs-full_IntangibleAssetsAndGoodwill_019c0020-9b5e-7481-a6a8-3d6d18aa9ff0" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.titanamerica.com/role/GoodwillKeyAssumptionsforValueinUseCalculationsDetails" xlink:type="simple" xlink:href="ttam-20251231.xsd#GoodwillKeyAssumptionsforValueinUseCalculationsDetails"/>
  <link:definitionLink xlink:role="http://www.titanamerica.com/role/GoodwillKeyAssumptionsforValueinUseCalculationsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfIntangibleAssetsLineItems_019c0020-9b5e-7230-820b-223955d36cff" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfIntangibleAssetsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfIntangibleAssetsTable_019c0020-9b5e-7b42-b528-c7b9f3c8afcf" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfIntangibleAssetsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfIntangibleAssetsLineItems_019c0020-9b5e-7230-820b-223955d36cff" xlink:to="loc_ifrs-full_DisclosureOfIntangibleAssetsTable_019c0020-9b5e-7b42-b528-c7b9f3c8afcf" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_SegmentsAxis_019c0020-9b5e-7669-a882-9e5d2af724b3" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_SegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfIntangibleAssetsTable_019c0020-9b5e-7b42-b528-c7b9f3c8afcf" xlink:to="loc_ifrs-full_SegmentsAxis_019c0020-9b5e-7669-a882-9e5d2af724b3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_SegmentsDomain_019c0020-9b5e-7669-a882-9e5d2af724b3_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_SegmentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_SegmentsAxis_019c0020-9b5e-7669-a882-9e5d2af724b3" xlink:to="loc_ifrs-full_SegmentsDomain_019c0020-9b5e-7669-a882-9e5d2af724b3_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_SegmentsDomain_019c0020-9b5e-7fd8-899b-7fa72157b286" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_SegmentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_SegmentsAxis_019c0020-9b5e-7669-a882-9e5d2af724b3" xlink:to="loc_ifrs-full_SegmentsDomain_019c0020-9b5e-7fd8-899b-7fa72157b286" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_FloridaBusinessReportableSegmentMember_019c0020-9b5e-7f40-b479-7468ae8b0793" xlink:href="ttam-20251231.xsd#ttam_FloridaBusinessReportableSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_SegmentsDomain_019c0020-9b5e-7fd8-899b-7fa72157b286" xlink:to="loc_ttam_FloridaBusinessReportableSegmentMember_019c0020-9b5e-7f40-b479-7468ae8b0793" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_MidAtlanticBusinessReportableSegmentMember_019c0020-9b5e-752d-8197-b6ebf3e5dafe" xlink:href="ttam-20251231.xsd#ttam_MidAtlanticBusinessReportableSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_SegmentsDomain_019c0020-9b5e-7fd8-899b-7fa72157b286" xlink:to="loc_ttam_MidAtlanticBusinessReportableSegmentMember_019c0020-9b5e-752d-8197-b6ebf3e5dafe" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_KeyAssumptionsGrowthRateAxis_019c0020-9b5e-7d68-b28d-4d9ed297f540" xlink:href="ttam-20251231.xsd#ttam_KeyAssumptionsGrowthRateAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfIntangibleAssetsTable_019c0020-9b5e-7b42-b528-c7b9f3c8afcf" xlink:to="loc_ttam_KeyAssumptionsGrowthRateAxis_019c0020-9b5e-7d68-b28d-4d9ed297f540" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_KeyAssumptionsGrowthRateDomain_019c0020-9b5e-7d68-b28d-4d9ed297f540_default" xlink:href="ttam-20251231.xsd#ttam_KeyAssumptionsGrowthRateDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ttam_KeyAssumptionsGrowthRateAxis_019c0020-9b5e-7d68-b28d-4d9ed297f540" xlink:to="loc_ttam_KeyAssumptionsGrowthRateDomain_019c0020-9b5e-7d68-b28d-4d9ed297f540_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_KeyAssumptionsGrowthRateDomain_019c0020-9b5e-7c11-b385-086f58906be7" xlink:href="ttam-20251231.xsd#ttam_KeyAssumptionsGrowthRateDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ttam_KeyAssumptionsGrowthRateAxis_019c0020-9b5e-7d68-b28d-4d9ed297f540" xlink:to="loc_ttam_KeyAssumptionsGrowthRateDomain_019c0020-9b5e-7c11-b385-086f58906be7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_FiveYearCompoundAnnualGrowthRateSalesVolumesMember_019c0020-9b5e-7f89-859f-560c7886844f" xlink:href="ttam-20251231.xsd#ttam_FiveYearCompoundAnnualGrowthRateSalesVolumesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ttam_KeyAssumptionsGrowthRateDomain_019c0020-9b5e-7c11-b385-086f58906be7" xlink:to="loc_ttam_FiveYearCompoundAnnualGrowthRateSalesVolumesMember_019c0020-9b5e-7f89-859f-560c7886844f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_FiveYearCompoundAnnualGrowthRateSellingPricesMember_019c0020-9b5e-78a0-9c38-54cc61d720bb" xlink:href="ttam-20251231.xsd#ttam_FiveYearCompoundAnnualGrowthRateSellingPricesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ttam_KeyAssumptionsGrowthRateDomain_019c0020-9b5e-7c11-b385-086f58906be7" xlink:to="loc_ttam_FiveYearCompoundAnnualGrowthRateSellingPricesMember_019c0020-9b5e-78a0-9c38-54cc61d720bb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_LongTermGrowthRateMember_019c0020-9b5e-7808-b388-9cb153adcc22" xlink:href="ttam-20251231.xsd#ttam_LongTermGrowthRateMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ttam_KeyAssumptionsGrowthRateDomain_019c0020-9b5e-7c11-b385-086f58906be7" xlink:to="loc_ttam_LongTermGrowthRateMember_019c0020-9b5e-7808-b388-9cb153adcc22" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DescriptionOfGrowthRateUsedToExtrapolateCashFlowProjections_019c0020-9b5e-756b-bb2a-5d350c4460f1" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DescriptionOfGrowthRateUsedToExtrapolateCashFlowProjections"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfIntangibleAssetsLineItems_019c0020-9b5e-7230-820b-223955d36cff" xlink:to="loc_ifrs-full_DescriptionOfGrowthRateUsedToExtrapolateCashFlowProjections_019c0020-9b5e-756b-bb2a-5d350c4460f1" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.titanamerica.com/role/GoodwillNarrativeDetails" xlink:type="simple" xlink:href="ttam-20251231.xsd#GoodwillNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.titanamerica.com/role/GoodwillNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfIntangibleAssetsLineItems_019c0020-9b5e-7d06-ae9c-6fadd67d38b7" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfIntangibleAssetsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfIntangibleAssetsTable_019c0020-9b5e-7acc-b3c4-bea74a2c3763" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfIntangibleAssetsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfIntangibleAssetsLineItems_019c0020-9b5e-7d06-ae9c-6fadd67d38b7" xlink:to="loc_ifrs-full_DisclosureOfIntangibleAssetsTable_019c0020-9b5e-7acc-b3c4-bea74a2c3763" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RangeAxis_019c0020-9b5e-7862-a0dc-eed606386d4c" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfIntangibleAssetsTable_019c0020-9b5e-7acc-b3c4-bea74a2c3763" xlink:to="loc_ifrs-full_RangeAxis_019c0020-9b5e-7862-a0dc-eed606386d4c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RangeDomain_019c0020-9b5e-7862-a0dc-eed606386d4c_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_RangeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_RangeAxis_019c0020-9b5e-7862-a0dc-eed606386d4c" xlink:to="loc_ifrs-full_RangeDomain_019c0020-9b5e-7862-a0dc-eed606386d4c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RangeDomain_019c0020-9b5e-746c-ad1d-a84c6c7d5a35" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_RangeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_RangeAxis_019c0020-9b5e-7862-a0dc-eed606386d4c" xlink:to="loc_ifrs-full_RangeDomain_019c0020-9b5e-746c-ad1d-a84c6c7d5a35" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BottomOfRangeMember_019c0020-9b5e-71b5-990d-a53ff58e4c0e" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BottomOfRangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_RangeDomain_019c0020-9b5e-746c-ad1d-a84c6c7d5a35" xlink:to="loc_ifrs-full_BottomOfRangeMember_019c0020-9b5e-71b5-990d-a53ff58e4c0e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TopOfRangeMember_019c0020-9b5e-710f-bbf5-ee6c77fe93e6" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TopOfRangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_RangeDomain_019c0020-9b5e-746c-ad1d-a84c6c7d5a35" xlink:to="loc_ifrs-full_TopOfRangeMember_019c0020-9b5e-710f-bbf5-ee6c77fe93e6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_KeyAssumptionsGrowthRateAxis_019c0020-9b5e-7450-bcb6-b3ac84aa98ba" xlink:href="ttam-20251231.xsd#ttam_KeyAssumptionsGrowthRateAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfIntangibleAssetsTable_019c0020-9b5e-7acc-b3c4-bea74a2c3763" xlink:to="loc_ttam_KeyAssumptionsGrowthRateAxis_019c0020-9b5e-7450-bcb6-b3ac84aa98ba" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_KeyAssumptionsGrowthRateDomain_019c0020-9b5e-7450-bcb6-b3ac84aa98ba_default" xlink:href="ttam-20251231.xsd#ttam_KeyAssumptionsGrowthRateDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ttam_KeyAssumptionsGrowthRateAxis_019c0020-9b5e-7450-bcb6-b3ac84aa98ba" xlink:to="loc_ttam_KeyAssumptionsGrowthRateDomain_019c0020-9b5e-7450-bcb6-b3ac84aa98ba_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_KeyAssumptionsGrowthRateDomain_019c0020-9b5e-7c1c-b6d8-a37a222c9eee" xlink:href="ttam-20251231.xsd#ttam_KeyAssumptionsGrowthRateDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ttam_KeyAssumptionsGrowthRateAxis_019c0020-9b5e-7450-bcb6-b3ac84aa98ba" xlink:to="loc_ttam_KeyAssumptionsGrowthRateDomain_019c0020-9b5e-7c1c-b6d8-a37a222c9eee" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_FiveYearCompoundAnnualGrowthRateSalesVolumesMember_019c0020-9b5e-77f7-9f08-1d4873baeaa7" xlink:href="ttam-20251231.xsd#ttam_FiveYearCompoundAnnualGrowthRateSalesVolumesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ttam_KeyAssumptionsGrowthRateDomain_019c0020-9b5e-7c1c-b6d8-a37a222c9eee" xlink:to="loc_ttam_FiveYearCompoundAnnualGrowthRateSalesVolumesMember_019c0020-9b5e-77f7-9f08-1d4873baeaa7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_FiveYearCompoundAnnualGrowthRateSellingPricesMember_019c0020-9b5e-7c10-9bcb-6d6282fe028e" xlink:href="ttam-20251231.xsd#ttam_FiveYearCompoundAnnualGrowthRateSellingPricesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ttam_KeyAssumptionsGrowthRateDomain_019c0020-9b5e-7c1c-b6d8-a37a222c9eee" xlink:to="loc_ttam_FiveYearCompoundAnnualGrowthRateSellingPricesMember_019c0020-9b5e-7c10-9bcb-6d6282fe028e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_LongTermGrowthRateMember_019c0020-9b5e-7c1c-91b3-fd7e4c9f28c0" xlink:href="ttam-20251231.xsd#ttam_LongTermGrowthRateMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ttam_KeyAssumptionsGrowthRateDomain_019c0020-9b5e-7c1c-b6d8-a37a222c9eee" xlink:to="loc_ttam_LongTermGrowthRateMember_019c0020-9b5e-7c1c-91b3-fd7e4c9f28c0" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DescriptionOfGrowthRateUsedToExtrapolateCashFlowProjections_019c0020-9b5e-7ec8-85e6-58819c535e70" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DescriptionOfGrowthRateUsedToExtrapolateCashFlowProjections"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfIntangibleAssetsLineItems_019c0020-9b5e-7d06-ae9c-6fadd67d38b7" xlink:to="loc_ifrs-full_DescriptionOfGrowthRateUsedToExtrapolateCashFlowProjections_019c0020-9b5e-7ec8-85e6-58819c535e70" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DescriptionOfDiscountRatesAppliedToCashFlowProjections_019c0020-9b5e-71c4-a0a7-538eca274c42" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DescriptionOfDiscountRatesAppliedToCashFlowProjections"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfIntangibleAssetsLineItems_019c0020-9b5e-7d06-ae9c-6fadd67d38b7" xlink:to="loc_ifrs-full_DescriptionOfDiscountRatesAppliedToCashFlowProjections_019c0020-9b5e-71c4-a0a7-538eca274c42" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.titanamerica.com/role/TradereceivablesNarrativeDetails" xlink:type="simple" xlink:href="ttam-20251231.xsd#TradereceivablesNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.titanamerica.com/role/TradereceivablesNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfFinancialAssetsLineItems_019c0020-9b5e-7fb2-9d5a-70751e8349dd" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfFinancialAssetsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfFinancialAssetsTable_019c0020-9b5e-743b-9186-972e0bf4a69b" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfFinancialAssetsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfFinancialAssetsLineItems_019c0020-9b5e-7fb2-9d5a-70751e8349dd" xlink:to="loc_ifrs-full_DisclosureOfFinancialAssetsTable_019c0020-9b5e-743b-9186-972e0bf4a69b" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RangeAxis_019c0020-9b5e-74dd-848e-72e0c882d2e7" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfFinancialAssetsTable_019c0020-9b5e-743b-9186-972e0bf4a69b" xlink:to="loc_ifrs-full_RangeAxis_019c0020-9b5e-74dd-848e-72e0c882d2e7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RangeDomain_019c0020-9b5e-74dd-848e-72e0c882d2e7_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_RangeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_RangeAxis_019c0020-9b5e-74dd-848e-72e0c882d2e7" xlink:to="loc_ifrs-full_RangeDomain_019c0020-9b5e-74dd-848e-72e0c882d2e7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RangeDomain_019c0020-9b5e-79a9-bdd4-f6c34738b915" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_RangeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_RangeAxis_019c0020-9b5e-74dd-848e-72e0c882d2e7" xlink:to="loc_ifrs-full_RangeDomain_019c0020-9b5e-79a9-bdd4-f6c34738b915" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BottomOfRangeMember_019c0020-9b5e-79f0-8265-1c8f2f4b9013" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BottomOfRangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_RangeDomain_019c0020-9b5e-79a9-bdd4-f6c34738b915" xlink:to="loc_ifrs-full_BottomOfRangeMember_019c0020-9b5e-79f0-8265-1c8f2f4b9013" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TopOfRangeMember_019c0020-9b5e-7135-8798-27a96230e079" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TopOfRangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_RangeDomain_019c0020-9b5e-79a9-bdd4-f6c34738b915" xlink:to="loc_ifrs-full_TopOfRangeMember_019c0020-9b5e-7135-8798-27a96230e079" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ExpectedCreditLossRate_019c0020-9b5e-7b52-b258-7a61ab7e1d8a" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ExpectedCreditLossRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfFinancialAssetsLineItems_019c0020-9b5e-7fb2-9d5a-70751e8349dd" xlink:to="loc_ifrs-full_ExpectedCreditLossRate_019c0020-9b5e-7b52-b258-7a61ab7e1d8a" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.titanamerica.com/role/TradereceivablesComponentsofTradeReceivablesDetails" xlink:type="simple" xlink:href="ttam-20251231.xsd#TradereceivablesComponentsofTradeReceivablesDetails"/>
  <link:definitionLink xlink:role="http://www.titanamerica.com/role/TradereceivablesComponentsofTradeReceivablesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfFinancialAssetsLineItems_019c0020-9b5e-7da5-adef-818883f1c3b6" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfFinancialAssetsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfFinancialAssetsTable_019c0020-9b5e-754f-995b-202f6d8638ac" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfFinancialAssetsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfFinancialAssetsLineItems_019c0020-9b5e-7da5-adef-818883f1c3b6" xlink:to="loc_ifrs-full_DisclosureOfFinancialAssetsTable_019c0020-9b5e-754f-995b-202f6d8638ac" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis_019c0020-9b5e-709f-806f-fe1fc5b7cdf3" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfFinancialAssetsTable_019c0020-9b5e-754f-995b-202f6d8638ac" xlink:to="loc_ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis_019c0020-9b5e-709f-806f-fe1fc5b7cdf3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CarryingAmountMember_019c0020-9b5e-709f-806f-fe1fc5b7cdf3_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CarryingAmountMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis_019c0020-9b5e-709f-806f-fe1fc5b7cdf3" xlink:to="loc_ifrs-full_CarryingAmountMember_019c0020-9b5e-709f-806f-fe1fc5b7cdf3_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CarryingAmountMember_019c0020-9b5e-7b0a-9c35-2f574325fc34" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CarryingAmountMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis_019c0020-9b5e-709f-806f-fe1fc5b7cdf3" xlink:to="loc_ifrs-full_CarryingAmountMember_019c0020-9b5e-7b0a-9c35-2f574325fc34" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_GrossCarryingAmountMember_019c0020-9b5e-7b19-9dac-23fa66780ba4" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_GrossCarryingAmountMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_CarryingAmountMember_019c0020-9b5e-7b0a-9c35-2f574325fc34" xlink:to="loc_ifrs-full_GrossCarryingAmountMember_019c0020-9b5e-7b19-9dac-23fa66780ba4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AccumulatedImpairmentMember_019c0020-9b5e-7203-b23a-53eb8a31325a" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_AccumulatedImpairmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_CarryingAmountMember_019c0020-9b5e-7b0a-9c35-2f574325fc34" xlink:to="loc_ifrs-full_AccumulatedImpairmentMember_019c0020-9b5e-7203-b23a-53eb8a31325a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfFinancialInstrumentsAxis_019c0020-9b5e-7017-a471-296afcd805e3" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfFinancialInstrumentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfFinancialAssetsTable_019c0020-9b5e-754f-995b-202f6d8638ac" xlink:to="loc_ifrs-full_ClassesOfFinancialInstrumentsAxis_019c0020-9b5e-7017-a471-296afcd805e3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfFinancialInstrumentsDomain_019c0020-9b5e-7017-a471-296afcd805e3_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_ClassesOfFinancialInstrumentsAxis_019c0020-9b5e-7017-a471-296afcd805e3" xlink:to="loc_ifrs-full_ClassesOfFinancialInstrumentsDomain_019c0020-9b5e-7017-a471-296afcd805e3_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfFinancialInstrumentsDomain_019c0020-9b5e-7c44-a30e-ff12dbbd3b47" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_ClassesOfFinancialInstrumentsAxis_019c0020-9b5e-7017-a471-296afcd805e3" xlink:to="loc_ifrs-full_ClassesOfFinancialInstrumentsDomain_019c0020-9b5e-7c44-a30e-ff12dbbd3b47" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TradeReceivablesMember_019c0020-9b5e-7f33-86ff-b4c66d131106" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TradeReceivablesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfFinancialInstrumentsDomain_019c0020-9b5e-7c44-a30e-ff12dbbd3b47" xlink:to="loc_ifrs-full_TradeReceivablesMember_019c0020-9b5e-7f33-86ff-b4c66d131106" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_FinancialAssets_019c0020-9b5e-7e37-99ab-424edee301a6" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_FinancialAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfFinancialAssetsLineItems_019c0020-9b5e-7da5-adef-818883f1c3b6" xlink:to="loc_ifrs-full_FinancialAssets_019c0020-9b5e-7e37-99ab-424edee301a6" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.titanamerica.com/role/TradereceivablesAgingofTradeReceivablesDetails" xlink:type="simple" xlink:href="ttam-20251231.xsd#TradereceivablesAgingofTradeReceivablesDetails"/>
  <link:definitionLink xlink:role="http://www.titanamerica.com/role/TradereceivablesAgingofTradeReceivablesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfFinancialAssetsThatAreEitherPastDueOrImpairedLineItems_019c0020-9b5e-7308-a89f-f48df9dacb1c" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfFinancialAssetsThatAreEitherPastDueOrImpairedLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfFinancialAssetsThatAreEitherPastDueOrImpairedTable_019c0020-9b5e-7433-8417-a7b88dbf6a40" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfFinancialAssetsThatAreEitherPastDueOrImpairedTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfFinancialAssetsThatAreEitherPastDueOrImpairedLineItems_019c0020-9b5e-7308-a89f-f48df9dacb1c" xlink:to="loc_ifrs-full_DisclosureOfFinancialAssetsThatAreEitherPastDueOrImpairedTable_019c0020-9b5e-7433-8417-a7b88dbf6a40" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_PastDueStatusAxis_019c0020-9b5e-722d-9678-fe586380b6af" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_PastDueStatusAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfFinancialAssetsThatAreEitherPastDueOrImpairedTable_019c0020-9b5e-7433-8417-a7b88dbf6a40" xlink:to="loc_ifrs-full_PastDueStatusAxis_019c0020-9b5e-722d-9678-fe586380b6af" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_PastDueStatusDomain_019c0020-9b5e-722d-9678-fe586380b6af_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_PastDueStatusDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_PastDueStatusAxis_019c0020-9b5e-722d-9678-fe586380b6af" xlink:to="loc_ifrs-full_PastDueStatusDomain_019c0020-9b5e-722d-9678-fe586380b6af_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_PastDueStatusDomain_019c0020-9b5e-7cad-ad4d-4bb67451a6d4" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_PastDueStatusDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_PastDueStatusAxis_019c0020-9b5e-722d-9678-fe586380b6af" xlink:to="loc_ifrs-full_PastDueStatusDomain_019c0020-9b5e-7cad-ad4d-4bb67451a6d4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CurrentMember_019c0020-9b5e-74a1-8470-ab2d67ddd3f6" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CurrentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_PastDueStatusDomain_019c0020-9b5e-7cad-ad4d-4bb67451a6d4" xlink:to="loc_ifrs-full_CurrentMember_019c0020-9b5e-74a1-8470-ab2d67ddd3f6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NotLaterThanOneMonthMember_019c0020-9b5e-779e-8b09-35d8b0506142" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NotLaterThanOneMonthMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_PastDueStatusDomain_019c0020-9b5e-7cad-ad4d-4bb67451a6d4" xlink:to="loc_ifrs-full_NotLaterThanOneMonthMember_019c0020-9b5e-779e-8b09-35d8b0506142" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LaterThanOneMonthAndNotLaterThanTwoMonthsMember_019c0020-9b5e-7871-9245-3e5588385e80" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_LaterThanOneMonthAndNotLaterThanTwoMonthsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_PastDueStatusDomain_019c0020-9b5e-7cad-ad4d-4bb67451a6d4" xlink:to="loc_ifrs-full_LaterThanOneMonthAndNotLaterThanTwoMonthsMember_019c0020-9b5e-7871-9245-3e5588385e80" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LaterThanTwoMonthsAndNotLaterThanThreeMonthsMember_019c0020-9b5e-7c4e-9d23-c94a561d0b53" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_LaterThanTwoMonthsAndNotLaterThanThreeMonthsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_PastDueStatusDomain_019c0020-9b5e-7cad-ad4d-4bb67451a6d4" xlink:to="loc_ifrs-full_LaterThanTwoMonthsAndNotLaterThanThreeMonthsMember_019c0020-9b5e-7c4e-9d23-c94a561d0b53" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LaterThanThreeMonthsAndNotLaterThanFourMonthsMember_019c0020-9b5e-7204-9036-927770562f75" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_LaterThanThreeMonthsAndNotLaterThanFourMonthsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_PastDueStatusDomain_019c0020-9b5e-7cad-ad4d-4bb67451a6d4" xlink:to="loc_ifrs-full_LaterThanThreeMonthsAndNotLaterThanFourMonthsMember_019c0020-9b5e-7204-9036-927770562f75" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LaterThanFourMonthsMember_019c0020-9b5e-7aae-8b84-91bccc492aa6" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_LaterThanFourMonthsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_PastDueStatusDomain_019c0020-9b5e-7cad-ad4d-4bb67451a6d4" xlink:to="loc_ifrs-full_LaterThanFourMonthsMember_019c0020-9b5e-7aae-8b84-91bccc492aa6" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis_019c0020-9b5e-730d-bf80-e8a9db90b5de" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfFinancialAssetsThatAreEitherPastDueOrImpairedTable_019c0020-9b5e-7433-8417-a7b88dbf6a40" xlink:to="loc_ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis_019c0020-9b5e-730d-bf80-e8a9db90b5de" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CarryingAmountMember_019c0020-9b5e-730d-bf80-e8a9db90b5de_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CarryingAmountMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis_019c0020-9b5e-730d-bf80-e8a9db90b5de" xlink:to="loc_ifrs-full_CarryingAmountMember_019c0020-9b5e-730d-bf80-e8a9db90b5de_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CarryingAmountMember_019c0020-9b5e-7520-9836-6eb754a67a32" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CarryingAmountMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis_019c0020-9b5e-730d-bf80-e8a9db90b5de" xlink:to="loc_ifrs-full_CarryingAmountMember_019c0020-9b5e-7520-9836-6eb754a67a32" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_GrossCarryingAmountMember_019c0020-9b5e-704e-bee1-3d59e61fbefe" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_GrossCarryingAmountMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_CarryingAmountMember_019c0020-9b5e-7520-9836-6eb754a67a32" xlink:to="loc_ifrs-full_GrossCarryingAmountMember_019c0020-9b5e-704e-bee1-3d59e61fbefe" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AccumulatedImpairmentMember_019c0020-9b5e-74d7-941c-9b1e78d8f6fe" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_AccumulatedImpairmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_CarryingAmountMember_019c0020-9b5e-7520-9836-6eb754a67a32" xlink:to="loc_ifrs-full_AccumulatedImpairmentMember_019c0020-9b5e-74d7-941c-9b1e78d8f6fe" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfFinancialInstrumentsAxis_019c0020-9b5e-745f-a4e8-64cb10933c9d" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfFinancialInstrumentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfFinancialAssetsThatAreEitherPastDueOrImpairedTable_019c0020-9b5e-7433-8417-a7b88dbf6a40" xlink:to="loc_ifrs-full_ClassesOfFinancialInstrumentsAxis_019c0020-9b5e-745f-a4e8-64cb10933c9d" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfFinancialInstrumentsDomain_019c0020-9b5e-745f-a4e8-64cb10933c9d_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_ClassesOfFinancialInstrumentsAxis_019c0020-9b5e-745f-a4e8-64cb10933c9d" xlink:to="loc_ifrs-full_ClassesOfFinancialInstrumentsDomain_019c0020-9b5e-745f-a4e8-64cb10933c9d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfFinancialInstrumentsDomain_019c0020-9b5e-79b1-ae82-84a8a8aac1cc" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_ClassesOfFinancialInstrumentsAxis_019c0020-9b5e-745f-a4e8-64cb10933c9d" xlink:to="loc_ifrs-full_ClassesOfFinancialInstrumentsDomain_019c0020-9b5e-79b1-ae82-84a8a8aac1cc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TradeReceivablesMember_019c0020-9b5e-79d4-bdef-97eb27e352aa" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TradeReceivablesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfFinancialInstrumentsDomain_019c0020-9b5e-79b1-ae82-84a8a8aac1cc" xlink:to="loc_ifrs-full_TradeReceivablesMember_019c0020-9b5e-79d4-bdef-97eb27e352aa" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_FinancialAssets_019c0020-9b5e-7561-84a8-2408dd469bad" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_FinancialAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfFinancialAssetsThatAreEitherPastDueOrImpairedLineItems_019c0020-9b5e-7308-a89f-f48df9dacb1c" xlink:to="loc_ifrs-full_FinancialAssets_019c0020-9b5e-7561-84a8-2408dd469bad" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.titanamerica.com/role/TradereceivablesActivitiesWithinExpectedCreditLossAllowanceDetails" xlink:type="simple" xlink:href="ttam-20251231.xsd#TradereceivablesActivitiesWithinExpectedCreditLossAllowanceDetails"/>
  <link:definitionLink xlink:role="http://www.titanamerica.com/role/TradereceivablesActivitiesWithinExpectedCreditLossAllowanceDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfFinancialAssetsLineItems_019c0020-9b5e-7d8a-bdf9-9cc5587b5bc7" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfFinancialAssetsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfFinancialAssetsTable_019c0020-9b5e-7bca-930d-395279a62e17" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfFinancialAssetsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfFinancialAssetsLineItems_019c0020-9b5e-7d8a-bdf9-9cc5587b5bc7" xlink:to="loc_ifrs-full_DisclosureOfFinancialAssetsTable_019c0020-9b5e-7bca-930d-395279a62e17" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis_019c0020-9b5e-74d9-8024-a30eb1f8fac8" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfFinancialAssetsTable_019c0020-9b5e-7bca-930d-395279a62e17" xlink:to="loc_ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis_019c0020-9b5e-74d9-8024-a30eb1f8fac8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CarryingAmountMember_019c0020-9b5e-74d9-8024-a30eb1f8fac8_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CarryingAmountMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis_019c0020-9b5e-74d9-8024-a30eb1f8fac8" xlink:to="loc_ifrs-full_CarryingAmountMember_019c0020-9b5e-74d9-8024-a30eb1f8fac8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CarryingAmountMember_019c0020-9b5e-79e4-b736-aaea9ecb2a51" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CarryingAmountMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis_019c0020-9b5e-74d9-8024-a30eb1f8fac8" xlink:to="loc_ifrs-full_CarryingAmountMember_019c0020-9b5e-79e4-b736-aaea9ecb2a51" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AccumulatedImpairmentMember_019c0020-9b5e-747a-8664-6f75d5c62db0" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_AccumulatedImpairmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_CarryingAmountMember_019c0020-9b5e-79e4-b736-aaea9ecb2a51" xlink:to="loc_ifrs-full_AccumulatedImpairmentMember_019c0020-9b5e-747a-8664-6f75d5c62db0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfFinancialInstrumentsAxis_019c0020-9b5e-7aee-b8b8-3aab30547c8d" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfFinancialInstrumentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfFinancialAssetsTable_019c0020-9b5e-7bca-930d-395279a62e17" xlink:to="loc_ifrs-full_ClassesOfFinancialInstrumentsAxis_019c0020-9b5e-7aee-b8b8-3aab30547c8d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfFinancialInstrumentsDomain_019c0020-9b5e-7aee-b8b8-3aab30547c8d_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_ClassesOfFinancialInstrumentsAxis_019c0020-9b5e-7aee-b8b8-3aab30547c8d" xlink:to="loc_ifrs-full_ClassesOfFinancialInstrumentsDomain_019c0020-9b5e-7aee-b8b8-3aab30547c8d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfFinancialInstrumentsDomain_019c0020-9b5e-7d45-a5f6-8e13d93ca518" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_ClassesOfFinancialInstrumentsAxis_019c0020-9b5e-7aee-b8b8-3aab30547c8d" xlink:to="loc_ifrs-full_ClassesOfFinancialInstrumentsDomain_019c0020-9b5e-7d45-a5f6-8e13d93ca518" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TradeReceivablesMember_019c0020-9b5e-7d93-81a3-dc8defb8b3f0" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TradeReceivablesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfFinancialInstrumentsDomain_019c0020-9b5e-7d45-a5f6-8e13d93ca518" xlink:to="loc_ifrs-full_TradeReceivablesMember_019c0020-9b5e-7d93-81a3-dc8defb8b3f0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_FinancialAssets_019c0020-9b5e-7c69-8945-adc5d29a78b3" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_FinancialAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfFinancialAssetsLineItems_019c0020-9b5e-7d8a-bdf9-9cc5587b5bc7" xlink:to="loc_ifrs-full_FinancialAssets_019c0020-9b5e-7c69-8945-adc5d29a78b3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ImpairmentLossRecognisedInProfitOrLoss_019c0020-9b5e-7c67-a494-76ea2ef5c7c9" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ImpairmentLossRecognisedInProfitOrLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfFinancialAssetsLineItems_019c0020-9b5e-7d8a-bdf9-9cc5587b5bc7" xlink:to="loc_ifrs-full_ImpairmentLossRecognisedInProfitOrLoss_019c0020-9b5e-7c67-a494-76ea2ef5c7c9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_IncreaseDecreaseThroughOtherMovementsFinancialAssets_019c0020-9b5e-7c77-b730-ac98857a849e" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_IncreaseDecreaseThroughOtherMovementsFinancialAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfFinancialAssetsLineItems_019c0020-9b5e-7d8a-bdf9-9cc5587b5bc7" xlink:to="loc_ifrs-full_IncreaseDecreaseThroughOtherMovementsFinancialAssets_019c0020-9b5e-7c77-b730-ac98857a849e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_FinancialAssets_019c0020-9b5e-71af-b26e-fdf1a78c1fe5" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_FinancialAssets"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.titanamerica.com/role/OtherReceivablesAgingAnalysisofOtherReceivablesDetails" xlink:type="simple" xlink:href="ttam-20251231.xsd#OtherReceivablesAgingAnalysisofOtherReceivablesDetails"/>
  <link:definitionLink xlink:role="http://www.titanamerica.com/role/OtherReceivablesAgingAnalysisofOtherReceivablesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfFinancialAssetsLineItems_019c0020-9b5e-79c4-bf18-f5e6db5aee45" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfFinancialAssetsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfFinancialAssetsTable_019c0020-9b5e-75eb-862e-400329c8c897" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfFinancialAssetsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfFinancialAssetsLineItems_019c0020-9b5e-79c4-bf18-f5e6db5aee45" xlink:to="loc_ifrs-full_DisclosureOfFinancialAssetsTable_019c0020-9b5e-75eb-862e-400329c8c897" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis_019c0020-9b5e-7690-a0aa-66edd76b1659" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfFinancialAssetsTable_019c0020-9b5e-75eb-862e-400329c8c897" xlink:to="loc_ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis_019c0020-9b5e-7690-a0aa-66edd76b1659" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CarryingAmountMember_019c0020-9b5e-7690-a0aa-66edd76b1659_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CarryingAmountMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis_019c0020-9b5e-7690-a0aa-66edd76b1659" xlink:to="loc_ifrs-full_CarryingAmountMember_019c0020-9b5e-7690-a0aa-66edd76b1659_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CarryingAmountMember_019c0020-9b5e-7d78-9138-a49097c7a69a" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CarryingAmountMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis_019c0020-9b5e-7690-a0aa-66edd76b1659" xlink:to="loc_ifrs-full_CarryingAmountMember_019c0020-9b5e-7d78-9138-a49097c7a69a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_GrossCarryingAmountMember_019c0020-9b5e-7431-9ea9-65bbde9f242f" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_GrossCarryingAmountMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_CarryingAmountMember_019c0020-9b5e-7d78-9138-a49097c7a69a" xlink:to="loc_ifrs-full_GrossCarryingAmountMember_019c0020-9b5e-7431-9ea9-65bbde9f242f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AccumulatedImpairmentMember_019c0020-9b5e-7c1c-99e9-6b5bb66cc222" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_AccumulatedImpairmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_CarryingAmountMember_019c0020-9b5e-7d78-9138-a49097c7a69a" xlink:to="loc_ifrs-full_AccumulatedImpairmentMember_019c0020-9b5e-7c1c-99e9-6b5bb66cc222" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_PastDueStatusAxis_019c0020-9b5e-72c4-8ab7-244e91a6de3f" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_PastDueStatusAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfFinancialAssetsTable_019c0020-9b5e-75eb-862e-400329c8c897" xlink:to="loc_ifrs-full_PastDueStatusAxis_019c0020-9b5e-72c4-8ab7-244e91a6de3f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_PastDueStatusDomain_019c0020-9b5e-72c4-8ab7-244e91a6de3f_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_PastDueStatusDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_PastDueStatusAxis_019c0020-9b5e-72c4-8ab7-244e91a6de3f" xlink:to="loc_ifrs-full_PastDueStatusDomain_019c0020-9b5e-72c4-8ab7-244e91a6de3f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_PastDueStatusDomain_019c0020-9b5e-7263-bdd1-d5cc21dbf3d1" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_PastDueStatusDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_PastDueStatusAxis_019c0020-9b5e-72c4-8ab7-244e91a6de3f" xlink:to="loc_ifrs-full_PastDueStatusDomain_019c0020-9b5e-7263-bdd1-d5cc21dbf3d1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_FinancialAssetsNeitherPastDueNorImpairedMember_019c0020-9b5e-758d-aad1-95f15c3aa9db" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_FinancialAssetsNeitherPastDueNorImpairedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_PastDueStatusDomain_019c0020-9b5e-7263-bdd1-d5cc21dbf3d1" xlink:to="loc_ifrs-full_FinancialAssetsNeitherPastDueNorImpairedMember_019c0020-9b5e-758d-aad1-95f15c3aa9db" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_NotLaterThanSixMonthsMember_019c0020-9b5e-72e9-bd59-a08abbf70b1c" xlink:href="ttam-20251231.xsd#ttam_NotLaterThanSixMonthsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_PastDueStatusDomain_019c0020-9b5e-7263-bdd1-d5cc21dbf3d1" xlink:to="loc_ttam_NotLaterThanSixMonthsMember_019c0020-9b5e-72e9-bd59-a08abbf70b1c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LaterThanSixMonthsAndNotLaterThanOneYearMember_019c0020-9b5e-7337-86c3-d8db72335588" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_LaterThanSixMonthsAndNotLaterThanOneYearMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_PastDueStatusDomain_019c0020-9b5e-7263-bdd1-d5cc21dbf3d1" xlink:to="loc_ifrs-full_LaterThanSixMonthsAndNotLaterThanOneYearMember_019c0020-9b5e-7337-86c3-d8db72335588" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_FinancialAssets_019c0020-9b5e-7d23-b488-5f64bfab9977" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_FinancialAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfFinancialAssetsLineItems_019c0020-9b5e-79c4-bf18-f5e6db5aee45" xlink:to="loc_ifrs-full_FinancialAssets_019c0020-9b5e-7d23-b488-5f64bfab9977" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.titanamerica.com/role/CreditfacilitiesandlongtermdebtCarryingAmountandFairValueofDebtObligationsDetails" xlink:type="simple" xlink:href="ttam-20251231.xsd#CreditfacilitiesandlongtermdebtCarryingAmountandFairValueofDebtObligationsDetails"/>
  <link:definitionLink xlink:role="http://www.titanamerica.com/role/CreditfacilitiesandlongtermdebtCarryingAmountandFairValueofDebtObligationsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_019c0020-9b5e-7852-a811-a5ac887348cf" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable_019c0020-9b5e-7ca4-8db2-d4de0d99cb2d" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_019c0020-9b5e-7852-a811-a5ac887348cf" xlink:to="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable_019c0020-9b5e-7ca4-8db2-d4de0d99cb2d" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_MeasurementAxis_019c0020-9b5e-7039-bd19-ba368ad038e4" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_MeasurementAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable_019c0020-9b5e-7ca4-8db2-d4de0d99cb2d" xlink:to="loc_ifrs-full_MeasurementAxis_019c0020-9b5e-7039-bd19-ba368ad038e4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_MeasurementDomain_019c0020-9b5e-7039-bd19-ba368ad038e4_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_MeasurementDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_MeasurementAxis_019c0020-9b5e-7039-bd19-ba368ad038e4" xlink:to="loc_ifrs-full_MeasurementDomain_019c0020-9b5e-7039-bd19-ba368ad038e4_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_MeasurementDomain_019c0020-9b5e-7709-bc9e-e6bf73eef46e" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_MeasurementDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_MeasurementAxis_019c0020-9b5e-7039-bd19-ba368ad038e4" xlink:to="loc_ifrs-full_MeasurementDomain_019c0020-9b5e-7709-bc9e-e6bf73eef46e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AtFairValueMember_019c0020-9b5e-779b-b004-ee918449bc97" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_AtFairValueMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_MeasurementDomain_019c0020-9b5e-7709-bc9e-e6bf73eef46e" xlink:to="loc_ifrs-full_AtFairValueMember_019c0020-9b5e-779b-b004-ee918449bc97" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_CurrentDebtAndLeaseObligationsAbstract_019c0020-9b5e-735b-b910-659eab540a2b" xlink:href="ttam-20251231.xsd#ttam_CurrentDebtAndLeaseObligationsAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_019c0020-9b5e-7852-a811-a5ac887348cf" xlink:to="loc_ttam_CurrentDebtAndLeaseObligationsAbstract_019c0020-9b5e-735b-b910-659eab540a2b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_CurrentPortionOfNonCurrentBorrowingsThirdParties_019c0020-9b5e-74d5-8836-765621ab12a5" xlink:href="ttam-20251231.xsd#ttam_CurrentPortionOfNonCurrentBorrowingsThirdParties"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ttam_CurrentDebtAndLeaseObligationsAbstract_019c0020-9b5e-735b-b910-659eab540a2b" xlink:to="loc_ttam_CurrentPortionOfNonCurrentBorrowingsThirdParties_019c0020-9b5e-74d5-8836-765621ab12a5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_CurrentPortionOfNonCurrentBorrowingsRelatedParties_019c0020-9b5e-7d8c-b39e-df2e237ac593" xlink:href="ttam-20251231.xsd#ttam_CurrentPortionOfNonCurrentBorrowingsRelatedParties"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ttam_CurrentDebtAndLeaseObligationsAbstract_019c0020-9b5e-735b-b910-659eab540a2b" xlink:to="loc_ttam_CurrentPortionOfNonCurrentBorrowingsRelatedParties_019c0020-9b5e-7d8c-b39e-df2e237ac593" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CurrentLeaseLiabilities_019c0020-9b5e-7d5f-b352-0e3e0be8e67d" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CurrentLeaseLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ttam_CurrentDebtAndLeaseObligationsAbstract_019c0020-9b5e-735b-b910-659eab540a2b" xlink:to="loc_ifrs-full_CurrentLeaseLiabilities_019c0020-9b5e-7d5f-b352-0e3e0be8e67d" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_CurrentBorrowingsAndLeaseLiabilities_019c0020-9b5e-79be-b336-4f2bab49f355" xlink:href="ttam-20251231.xsd#ttam_CurrentBorrowingsAndLeaseLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ttam_CurrentDebtAndLeaseObligationsAbstract_019c0020-9b5e-735b-b910-659eab540a2b" xlink:to="loc_ttam_CurrentBorrowingsAndLeaseLiabilities_019c0020-9b5e-79be-b336-4f2bab49f355" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_NonCurrentDebtAndLeaseObligationsAbstract_019c0020-9b5e-7e81-ad3d-8f52d2581c30" xlink:href="ttam-20251231.xsd#ttam_NonCurrentDebtAndLeaseObligationsAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_019c0020-9b5e-7852-a811-a5ac887348cf" xlink:to="loc_ttam_NonCurrentDebtAndLeaseObligationsAbstract_019c0020-9b5e-7e81-ad3d-8f52d2581c30" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LongtermBorrowings_019c0020-9b5e-7d21-aac6-d6c25f51bd38" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_LongtermBorrowings"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ttam_NonCurrentDebtAndLeaseObligationsAbstract_019c0020-9b5e-7e81-ad3d-8f52d2581c30" xlink:to="loc_ifrs-full_LongtermBorrowings_019c0020-9b5e-7d21-aac6-d6c25f51bd38" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NoncurrentLeaseLiabilities_019c0020-9b5e-7a77-9b3d-1bc51e0faa5e" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NoncurrentLeaseLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ttam_NonCurrentDebtAndLeaseObligationsAbstract_019c0020-9b5e-7e81-ad3d-8f52d2581c30" xlink:to="loc_ifrs-full_NoncurrentLeaseLiabilities_019c0020-9b5e-7a77-9b3d-1bc51e0faa5e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_NonCurrentBorrowingsAndLeaseLiabilities_019c0020-9b5e-7db9-bbcd-87aee6af3602" xlink:href="ttam-20251231.xsd#ttam_NonCurrentBorrowingsAndLeaseLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ttam_NonCurrentDebtAndLeaseObligationsAbstract_019c0020-9b5e-7e81-ad3d-8f52d2581c30" xlink:to="loc_ttam_NonCurrentBorrowingsAndLeaseLiabilities_019c0020-9b5e-7db9-bbcd-87aee6af3602" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_BorrowingsAndLeaseLiabilities_019c0020-9b5e-776b-b90a-43c58952ca46" xlink:href="ttam-20251231.xsd#ttam_BorrowingsAndLeaseLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_019c0020-9b5e-7852-a811-a5ac887348cf" xlink:to="loc_ttam_BorrowingsAndLeaseLiabilities_019c0020-9b5e-776b-b90a-43c58952ca46" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.titanamerica.com/role/CreditfacilitiesandlongtermdebtNarrativeDetails" xlink:type="simple" xlink:href="ttam-20251231.xsd#CreditfacilitiesandlongtermdebtNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.titanamerica.com/role/CreditfacilitiesandlongtermdebtNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_019c0020-9b5e-743a-8840-2569b8851a7a" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable_019c0020-9b5e-7cdd-ae4c-c0a14f593401" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_019c0020-9b5e-743a-8840-2569b8851a7a" xlink:to="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable_019c0020-9b5e-7cdd-ae4c-c0a14f593401" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BorrowingsByNameAxis_019c0020-9b5e-7f57-b175-bbf4bebe8149" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BorrowingsByNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable_019c0020-9b5e-7cdd-ae4c-c0a14f593401" xlink:to="loc_ifrs-full_BorrowingsByNameAxis_019c0020-9b5e-7f57-b175-bbf4bebe8149" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BorrowingsByNameDomain_019c0020-9b5e-7f57-b175-bbf4bebe8149_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BorrowingsByNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_BorrowingsByNameAxis_019c0020-9b5e-7f57-b175-bbf4bebe8149" xlink:to="loc_ifrs-full_BorrowingsByNameDomain_019c0020-9b5e-7f57-b175-bbf4bebe8149_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BorrowingsByNameDomain_019c0020-9b5e-713e-b796-99b85e024983" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BorrowingsByNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_BorrowingsByNameAxis_019c0020-9b5e-7f57-b175-bbf4bebe8149" xlink:to="loc_ifrs-full_BorrowingsByNameDomain_019c0020-9b5e-713e-b796-99b85e024983" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_MulticurrencyRevolvingCreditFacilityMember_019c0020-9b5e-738d-8a34-11c5ba0f2be1" xlink:href="ttam-20251231.xsd#ttam_MulticurrencyRevolvingCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BorrowingsByNameDomain_019c0020-9b5e-713e-b796-99b85e024983" xlink:to="loc_ttam_MulticurrencyRevolvingCreditFacilityMember_019c0020-9b5e-738d-8a34-11c5ba0f2be1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_CommittedBorrowingFacilityMember_019c0020-9b5e-784d-b814-4be569e6a091" xlink:href="ttam-20251231.xsd#ttam_CommittedBorrowingFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BorrowingsByNameDomain_019c0020-9b5e-713e-b796-99b85e024983" xlink:to="loc_ttam_CommittedBorrowingFacilityMember_019c0020-9b5e-784d-b814-4be569e6a091" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_UncommittedBorrowingFacilityMaturingDecember2025Member_019c0020-9b5e-71c8-b6a8-fa4b14c17d54" xlink:href="ttam-20251231.xsd#ttam_UncommittedBorrowingFacilityMaturingDecember2025Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BorrowingsByNameDomain_019c0020-9b5e-713e-b796-99b85e024983" xlink:to="loc_ttam_UncommittedBorrowingFacilityMaturingDecember2025Member_019c0020-9b5e-71c8-b6a8-fa4b14c17d54" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_UncommittedBorrowingFacilityMaturingApril2025Member_019c0020-9b5e-7b34-92e8-9c974b6d641b" xlink:href="ttam-20251231.xsd#ttam_UncommittedBorrowingFacilityMaturingApril2025Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BorrowingsByNameDomain_019c0020-9b5e-713e-b796-99b85e024983" xlink:to="loc_ttam_UncommittedBorrowingFacilityMaturingApril2025Member_019c0020-9b5e-7b34-92e8-9c974b6d641b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_NotePayableEstablishedDecember2017Member_019c0020-9b5e-7065-ad3d-222082219a3b" xlink:href="ttam-20251231.xsd#ttam_NotePayableEstablishedDecember2017Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BorrowingsByNameDomain_019c0020-9b5e-713e-b796-99b85e024983" xlink:to="loc_ttam_NotePayableEstablishedDecember2017Member_019c0020-9b5e-7065-ad3d-222082219a3b" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_NotePayableEstablishedMarch2018Member_019c0020-9b5e-710f-a31c-8717817c0ce6" xlink:href="ttam-20251231.xsd#ttam_NotePayableEstablishedMarch2018Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BorrowingsByNameDomain_019c0020-9b5e-713e-b796-99b85e024983" xlink:to="loc_ttam_NotePayableEstablishedMarch2018Member_019c0020-9b5e-710f-a31c-8717817c0ce6" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_NotePayableEstablishedJune2021LoanOneMember_019c0020-9b5e-711b-b278-43227a67de7a" xlink:href="ttam-20251231.xsd#ttam_NotePayableEstablishedJune2021LoanOneMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BorrowingsByNameDomain_019c0020-9b5e-713e-b796-99b85e024983" xlink:to="loc_ttam_NotePayableEstablishedJune2021LoanOneMember_019c0020-9b5e-711b-b278-43227a67de7a" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_NotePayableEstablishedJune21LoanTwoMember_019c0020-9b5e-7e36-9e9f-7b582bdf008d" xlink:href="ttam-20251231.xsd#ttam_NotePayableEstablishedJune21LoanTwoMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BorrowingsByNameDomain_019c0020-9b5e-713e-b796-99b85e024983" xlink:to="loc_ttam_NotePayableEstablishedJune21LoanTwoMember_019c0020-9b5e-7e36-9e9f-7b582bdf008d" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_NotePayableEstablishedNovember152024Member_019c0020-9b5e-77f4-96d9-c9cf4b644f6c" xlink:href="ttam-20251231.xsd#ttam_NotePayableEstablishedNovember152024Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BorrowingsByNameDomain_019c0020-9b5e-713e-b796-99b85e024983" xlink:to="loc_ttam_NotePayableEstablishedNovember152024Member_019c0020-9b5e-77f4-96d9-c9cf4b644f6c" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_CashManagementAgreementMember_019c0020-9b5e-76ea-8915-925655d745ed" xlink:href="ttam-20251231.xsd#ttam_CashManagementAgreementMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BorrowingsByNameDomain_019c0020-9b5e-713e-b796-99b85e024983" xlink:to="loc_ttam_CashManagementAgreementMember_019c0020-9b5e-76ea-8915-925655d745ed" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_DebtTypeAxis_019c0020-9b5e-7a3f-b3ad-2dcbd3cb95f1" xlink:href="ttam-20251231.xsd#ttam_DebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable_019c0020-9b5e-7cdd-ae4c-c0a14f593401" xlink:to="loc_ttam_DebtTypeAxis_019c0020-9b5e-7a3f-b3ad-2dcbd3cb95f1" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_DebtTypeDomain_019c0020-9b5e-7a3f-b3ad-2dcbd3cb95f1_default" xlink:href="ttam-20251231.xsd#ttam_DebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ttam_DebtTypeAxis_019c0020-9b5e-7a3f-b3ad-2dcbd3cb95f1" xlink:to="loc_ttam_DebtTypeDomain_019c0020-9b5e-7a3f-b3ad-2dcbd3cb95f1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_DebtTypeDomain_019c0020-9b5e-743f-8996-b30c768621fa" xlink:href="ttam-20251231.xsd#ttam_DebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ttam_DebtTypeAxis_019c0020-9b5e-7a3f-b3ad-2dcbd3cb95f1" xlink:to="loc_ttam_DebtTypeDomain_019c0020-9b5e-743f-8996-b30c768621fa" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_LettersOfCreditMember_019c0020-9b5e-7058-a3aa-4c7d5289b436" xlink:href="ttam-20251231.xsd#ttam_LettersOfCreditMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ttam_DebtTypeDomain_019c0020-9b5e-743f-8996-b30c768621fa" xlink:to="loc_ttam_LettersOfCreditMember_019c0020-9b5e-7058-a3aa-4c7d5289b436" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_LineOfCreditsMember_019c89e4-2581-7591-aed7-21962fe149cf" xlink:href="ttam-20251231.xsd#ttam_LineOfCreditsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ttam_DebtTypeDomain_019c0020-9b5e-743f-8996-b30c768621fa" xlink:to="loc_ttam_LineOfCreditsMember_019c89e4-2581-7591-aed7-21962fe149cf" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_Borrowing.InterestTermAxis_019c0020-9b5e-7501-8b81-e8935ce9600d" xlink:href="ttam-20251231.xsd#ttam_Borrowing.InterestTermAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable_019c0020-9b5e-7cdd-ae4c-c0a14f593401" xlink:to="loc_ttam_Borrowing.InterestTermAxis_019c0020-9b5e-7501-8b81-e8935ce9600d" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_Borrowing.InterestTermDomain_019c0020-9b5e-7501-8b81-e8935ce9600d_default" xlink:href="ttam-20251231.xsd#ttam_Borrowing.InterestTermDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ttam_Borrowing.InterestTermAxis_019c0020-9b5e-7501-8b81-e8935ce9600d" xlink:to="loc_ttam_Borrowing.InterestTermDomain_019c0020-9b5e-7501-8b81-e8935ce9600d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_Borrowing.InterestTermDomain_019c0020-9b5e-742f-8de2-e87b1c0737cf" xlink:href="ttam-20251231.xsd#ttam_Borrowing.InterestTermDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ttam_Borrowing.InterestTermAxis_019c0020-9b5e-7501-8b81-e8935ce9600d" xlink:to="loc_ttam_Borrowing.InterestTermDomain_019c0020-9b5e-742f-8de2-e87b1c0737cf" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_InterestRateTermOneMember_019c0020-9b5e-772e-b416-a54e2f8287e7" xlink:href="ttam-20251231.xsd#ttam_InterestRateTermOneMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ttam_Borrowing.InterestTermDomain_019c0020-9b5e-742f-8de2-e87b1c0737cf" xlink:to="loc_ttam_InterestRateTermOneMember_019c0020-9b5e-772e-b416-a54e2f8287e7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_InterestRateTermTwoMember_019c0020-9b5e-70aa-9041-e62fa43295d4" xlink:href="ttam-20251231.xsd#ttam_InterestRateTermTwoMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ttam_Borrowing.InterestTermDomain_019c0020-9b5e-742f-8de2-e87b1c0737cf" xlink:to="loc_ttam_InterestRateTermTwoMember_019c0020-9b5e-70aa-9041-e62fa43295d4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_BorrowingFacilitiesMaximumBorrowingCapacity_019c0020-9b5e-7c1a-82a3-a4ecec96abec" xlink:href="ttam-20251231.xsd#ttam_BorrowingFacilitiesMaximumBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_019c0020-9b5e-743a-8840-2569b8851a7a" xlink:to="loc_ttam_BorrowingFacilitiesMaximumBorrowingCapacity_019c0020-9b5e-7c1a-82a3-a4ecec96abec" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_Borrowings_019c0020-9b5e-7039-bb7a-1aec55ab1a12" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_Borrowings"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_019c0020-9b5e-743a-8840-2569b8851a7a" xlink:to="loc_ifrs-full_Borrowings_019c0020-9b5e-7039-bb7a-1aec55ab1a12" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_BorrowingFacilitiesOperatingAmount_019c89e4-72f3-7b53-a7b5-5ecbeb366570" xlink:href="ttam-20251231.xsd#ttam_BorrowingFacilitiesOperatingAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_019c0020-9b5e-743a-8840-2569b8851a7a" xlink:to="loc_ttam_BorrowingFacilitiesOperatingAmount_019c89e4-72f3-7b53-a7b5-5ecbeb366570" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_BorrowingFacilitiesNetTangibleValue_019c89e4-2581-7590-baf7-40bda54411b5" xlink:href="ttam-20251231.xsd#ttam_BorrowingFacilitiesNetTangibleValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_019c0020-9b5e-743a-8840-2569b8851a7a" xlink:to="loc_ttam_BorrowingFacilitiesNetTangibleValue_019c89e4-2581-7590-baf7-40bda54411b5" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_BorrowingFacilitiesLineOfCreditAmount_019c89e4-72f3-7893-9a72-04ccc92769a0" xlink:href="ttam-20251231.xsd#ttam_BorrowingFacilitiesLineOfCreditAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_019c0020-9b5e-743a-8840-2569b8851a7a" xlink:to="loc_ttam_BorrowingFacilitiesLineOfCreditAmount_019c89e4-72f3-7893-9a72-04ccc92769a0" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NotionalAmount_019c0020-9b5e-77b1-acf4-d2619e55bcc4" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NotionalAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_019c0020-9b5e-743a-8840-2569b8851a7a" xlink:to="loc_ifrs-full_NotionalAmount_019c0020-9b5e-77b1-acf4-d2619e55bcc4" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BorrowingsInterestRate_019c0020-9b5e-7280-96a3-803931d577e7" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BorrowingsInterestRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_019c0020-9b5e-743a-8840-2569b8851a7a" xlink:to="loc_ifrs-full_BorrowingsInterestRate_019c0020-9b5e-7280-96a3-803931d577e7" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RepaymentsOfNoncurrentBorrowings_019c0020-9b5e-78f4-bdb0-8f3a76fedeaf" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_RepaymentsOfNoncurrentBorrowings"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_019c0020-9b5e-743a-8840-2569b8851a7a" xlink:to="loc_ifrs-full_RepaymentsOfNoncurrentBorrowings_019c0020-9b5e-78f4-bdb0-8f3a76fedeaf" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_BorrowingsNumberOfLoans_019c0020-9b5e-7f76-b43b-50aa11c7c749" xlink:href="ttam-20251231.xsd#ttam_BorrowingsNumberOfLoans"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_019c0020-9b5e-743a-8840-2569b8851a7a" xlink:to="loc_ttam_BorrowingsNumberOfLoans_019c0020-9b5e-7f76-b43b-50aa11c7c749" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_BorrowingFacilitiesNumberOfBankAccounts_019c0020-9b5e-7241-8f83-674fabcb2bf6" xlink:href="ttam-20251231.xsd#ttam_BorrowingFacilitiesNumberOfBankAccounts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_019c0020-9b5e-743a-8840-2569b8851a7a" xlink:to="loc_ttam_BorrowingFacilitiesNumberOfBankAccounts_019c0020-9b5e-7241-8f83-674fabcb2bf6" xlink:type="arc" order="9"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.titanamerica.com/role/CreditfacilitiesandlongtermdebtMaturityofNonCurrentBorrowingsDetails" xlink:type="simple" xlink:href="ttam-20251231.xsd#CreditfacilitiesandlongtermdebtMaturityofNonCurrentBorrowingsDetails"/>
  <link:definitionLink xlink:role="http://www.titanamerica.com/role/CreditfacilitiesandlongtermdebtMaturityofNonCurrentBorrowingsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_019c0020-9b5e-7684-862e-dfaa1e566b63" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable_019c0020-9b5e-7e9d-8cd2-805138b23e71" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_019c0020-9b5e-7684-862e-dfaa1e566b63" xlink:to="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable_019c0020-9b5e-7e9d-8cd2-805138b23e71" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_MaturityAxis_019c0020-9b5e-7190-a60b-9d12d893e681" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_MaturityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable_019c0020-9b5e-7e9d-8cd2-805138b23e71" xlink:to="loc_ifrs-full_MaturityAxis_019c0020-9b5e-7190-a60b-9d12d893e681" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_MaturityDomain_019c0020-9b5e-7190-a60b-9d12d893e681_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_MaturityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_MaturityAxis_019c0020-9b5e-7190-a60b-9d12d893e681" xlink:to="loc_ifrs-full_MaturityDomain_019c0020-9b5e-7190-a60b-9d12d893e681_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_MaturityDomain_019c0020-9b5e-7385-abe3-a83c3b6988da" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_MaturityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_MaturityAxis_019c0020-9b5e-7190-a60b-9d12d893e681" xlink:to="loc_ifrs-full_MaturityDomain_019c0020-9b5e-7385-abe3-a83c3b6988da" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LaterThanOneYearAndNotLaterThanTwoYearsMember_019c0020-9b5e-7e89-b00c-01cc0126d631" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_LaterThanOneYearAndNotLaterThanTwoYearsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_MaturityDomain_019c0020-9b5e-7385-abe3-a83c3b6988da" xlink:to="loc_ifrs-full_LaterThanOneYearAndNotLaterThanTwoYearsMember_019c0020-9b5e-7e89-b00c-01cc0126d631" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LaterThanTwoYearsAndNotLaterThanThreeYearsMember_019c0020-9b5e-7fc1-a3c3-a1547b3b86b0" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_LaterThanTwoYearsAndNotLaterThanThreeYearsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_MaturityDomain_019c0020-9b5e-7385-abe3-a83c3b6988da" xlink:to="loc_ifrs-full_LaterThanTwoYearsAndNotLaterThanThreeYearsMember_019c0020-9b5e-7fc1-a3c3-a1547b3b86b0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LaterThanThreeYearsAndNotLaterThanFourYearsMember_019c0020-9b5e-7246-8ef9-2883876cfae7" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_LaterThanThreeYearsAndNotLaterThanFourYearsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_MaturityDomain_019c0020-9b5e-7385-abe3-a83c3b6988da" xlink:to="loc_ifrs-full_LaterThanThreeYearsAndNotLaterThanFourYearsMember_019c0020-9b5e-7246-8ef9-2883876cfae7" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LaterThanFourYearsAndNotLaterThanFiveYearsMember_019c0020-9b5e-73bb-aeef-a7e17258a2da" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_LaterThanFourYearsAndNotLaterThanFiveYearsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_MaturityDomain_019c0020-9b5e-7385-abe3-a83c3b6988da" xlink:to="loc_ifrs-full_LaterThanFourYearsAndNotLaterThanFiveYearsMember_019c0020-9b5e-73bb-aeef-a7e17258a2da" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LaterThanFiveYearsMember_019c0020-9b5e-7b32-82d2-e12117e38dc0" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_LaterThanFiveYearsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_MaturityDomain_019c0020-9b5e-7385-abe3-a83c3b6988da" xlink:to="loc_ifrs-full_LaterThanFiveYearsMember_019c0020-9b5e-7b32-82d2-e12117e38dc0" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LongtermBorrowings_019c0020-9b5e-7037-ba3c-4ca6809a8215" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_LongtermBorrowings"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_019c0020-9b5e-7684-862e-dfaa1e566b63" xlink:to="loc_ifrs-full_LongtermBorrowings_019c0020-9b5e-7037-ba3c-4ca6809a8215" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NoncurrentLeaseLiabilities_019c0020-9b5e-7d15-8e9e-3b8b8ddb6864" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NoncurrentLeaseLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_019c0020-9b5e-7684-862e-dfaa1e566b63" xlink:to="loc_ifrs-full_NoncurrentLeaseLiabilities_019c0020-9b5e-7d15-8e9e-3b8b8ddb6864" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_NonCurrentBorrowingsAndLeaseLiabilities_019c0020-9b5e-7f5b-924e-8cb3479ec2ba" xlink:href="ttam-20251231.xsd#ttam_NonCurrentBorrowingsAndLeaseLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_019c0020-9b5e-7684-862e-dfaa1e566b63" xlink:to="loc_ttam_NonCurrentBorrowingsAndLeaseLiabilities_019c0020-9b5e-7f5b-924e-8cb3479ec2ba" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.titanamerica.com/role/CreditfacilitiesandlongtermdebtWeightedAverageEffectiveInterestRatesDetails" xlink:type="simple" xlink:href="ttam-20251231.xsd#CreditfacilitiesandlongtermdebtWeightedAverageEffectiveInterestRatesDetails"/>
  <link:definitionLink xlink:role="http://www.titanamerica.com/role/CreditfacilitiesandlongtermdebtWeightedAverageEffectiveInterestRatesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_019c0020-9b5e-7952-8d95-ca40d45611a5" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable_019c0020-9b5e-72d5-8f96-9cc06af21b1b" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_019c0020-9b5e-7952-8d95-ca40d45611a5" xlink:to="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable_019c0020-9b5e-72d5-8f96-9cc06af21b1b" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BorrowingsByNameAxis_019c0020-9b5e-7518-8784-c9a812ad54ad" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BorrowingsByNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable_019c0020-9b5e-72d5-8f96-9cc06af21b1b" xlink:to="loc_ifrs-full_BorrowingsByNameAxis_019c0020-9b5e-7518-8784-c9a812ad54ad" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BorrowingsByNameDomain_019c0020-9b5e-7518-8784-c9a812ad54ad_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BorrowingsByNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_BorrowingsByNameAxis_019c0020-9b5e-7518-8784-c9a812ad54ad" xlink:to="loc_ifrs-full_BorrowingsByNameDomain_019c0020-9b5e-7518-8784-c9a812ad54ad_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BorrowingsByNameDomain_019c0020-9b5e-73ce-a19a-9328ac7a92bf" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BorrowingsByNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_BorrowingsByNameAxis_019c0020-9b5e-7518-8784-c9a812ad54ad" xlink:to="loc_ifrs-full_BorrowingsByNameDomain_019c0020-9b5e-73ce-a19a-9328ac7a92bf" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_VariableRateLoansFromRelatedPartiesMember_019c0020-9b5e-77b0-9912-71e7ab383438" xlink:href="ttam-20251231.xsd#ttam_VariableRateLoansFromRelatedPartiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BorrowingsByNameDomain_019c0020-9b5e-73ce-a19a-9328ac7a92bf" xlink:to="loc_ttam_VariableRateLoansFromRelatedPartiesMember_019c0020-9b5e-77b0-9912-71e7ab383438" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_FixedRateLoansFromRelatedPartiesMember_019c0020-9b5e-7a8d-a2ce-f2181e2670a0" xlink:href="ttam-20251231.xsd#ttam_FixedRateLoansFromRelatedPartiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BorrowingsByNameDomain_019c0020-9b5e-73ce-a19a-9328ac7a92bf" xlink:to="loc_ttam_FixedRateLoansFromRelatedPartiesMember_019c0020-9b5e-7a8d-a2ce-f2181e2670a0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_VariableRateLoansFromThirdPartiesMember_019c0020-9b5e-7f25-9eb1-dc6a83357e13" xlink:href="ttam-20251231.xsd#ttam_VariableRateLoansFromThirdPartiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BorrowingsByNameDomain_019c0020-9b5e-73ce-a19a-9328ac7a92bf" xlink:to="loc_ttam_VariableRateLoansFromThirdPartiesMember_019c0020-9b5e-7f25-9eb1-dc6a83357e13" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RangeAxis_019c0020-9b5e-7cb0-a790-c0156ba2341c" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable_019c0020-9b5e-72d5-8f96-9cc06af21b1b" xlink:to="loc_ifrs-full_RangeAxis_019c0020-9b5e-7cb0-a790-c0156ba2341c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RangeDomain_019c0020-9b5e-7cb0-a790-c0156ba2341c_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_RangeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_RangeAxis_019c0020-9b5e-7cb0-a790-c0156ba2341c" xlink:to="loc_ifrs-full_RangeDomain_019c0020-9b5e-7cb0-a790-c0156ba2341c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RangeDomain_019c0020-9b5e-7215-b692-dcb9696236de" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_RangeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_RangeAxis_019c0020-9b5e-7cb0-a790-c0156ba2341c" xlink:to="loc_ifrs-full_RangeDomain_019c0020-9b5e-7215-b692-dcb9696236de" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_WeightedAverageMember_019c0020-9b5e-7736-87ab-cbd2c55b797c" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_WeightedAverageMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_RangeDomain_019c0020-9b5e-7215-b692-dcb9696236de" xlink:to="loc_ifrs-full_WeightedAverageMember_019c0020-9b5e-7736-87ab-cbd2c55b797c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BorrowingsInterestRate_019c0020-9b5e-768b-b264-07a5602489e8" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BorrowingsInterestRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_019c0020-9b5e-7952-8d95-ca40d45611a5" xlink:to="loc_ifrs-full_BorrowingsInterestRate_019c0020-9b5e-768b-b264-07a5602489e8" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.titanamerica.com/role/CreditfacilitiesandlongtermdebtUndrawnBorrowingFacilitiesDetails" xlink:type="simple" xlink:href="ttam-20251231.xsd#CreditfacilitiesandlongtermdebtUndrawnBorrowingFacilitiesDetails"/>
  <link:definitionLink xlink:role="http://www.titanamerica.com/role/CreditfacilitiesandlongtermdebtUndrawnBorrowingFacilitiesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_019c0020-9b5e-7f53-8e87-2d6b34464fb7" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable_019c0020-9b5e-7a4f-bbe6-b868a74a92d8" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_019c0020-9b5e-7f53-8e87-2d6b34464fb7" xlink:to="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable_019c0020-9b5e-7a4f-bbe6-b868a74a92d8" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_MaturityAxis_019c0020-9b5e-7802-8572-43e1ce27d12a" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_MaturityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable_019c0020-9b5e-7a4f-bbe6-b868a74a92d8" xlink:to="loc_ifrs-full_MaturityAxis_019c0020-9b5e-7802-8572-43e1ce27d12a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_MaturityDomain_019c0020-9b5e-7802-8572-43e1ce27d12a_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_MaturityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_MaturityAxis_019c0020-9b5e-7802-8572-43e1ce27d12a" xlink:to="loc_ifrs-full_MaturityDomain_019c0020-9b5e-7802-8572-43e1ce27d12a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_MaturityDomain_019c0020-9b5e-7250-a1b6-0551091866f1" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_MaturityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_MaturityAxis_019c0020-9b5e-7802-8572-43e1ce27d12a" xlink:to="loc_ifrs-full_MaturityDomain_019c0020-9b5e-7250-a1b6-0551091866f1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NotLaterThanOneYearMember_019c0020-9b5e-74f1-bb06-9a4c169c51cf" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NotLaterThanOneYearMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_MaturityDomain_019c0020-9b5e-7250-a1b6-0551091866f1" xlink:to="loc_ifrs-full_NotLaterThanOneYearMember_019c0020-9b5e-74f1-bb06-9a4c169c51cf" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LaterThanOneYearMember_019c0020-9b5e-7128-802e-c9d17a57c166" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_LaterThanOneYearMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_MaturityDomain_019c0020-9b5e-7250-a1b6-0551091866f1" xlink:to="loc_ifrs-full_LaterThanOneYearMember_019c0020-9b5e-7128-802e-c9d17a57c166" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_UndrawnBorrowingFacilities_019c0020-9b5e-77b8-9cbd-2ca409659289" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_UndrawnBorrowingFacilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_019c0020-9b5e-7f53-8e87-2d6b34464fb7" xlink:to="loc_ifrs-full_UndrawnBorrowingFacilities_019c0020-9b5e-77b8-9cbd-2ca409659289" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.titanamerica.com/role/CreditfacilitiesandlongtermdebtLettersofCreditandBondsIssuedDetails" xlink:type="simple" xlink:href="ttam-20251231.xsd#CreditfacilitiesandlongtermdebtLettersofCreditandBondsIssuedDetails"/>
  <link:definitionLink xlink:role="http://www.titanamerica.com/role/CreditfacilitiesandlongtermdebtLettersofCreditandBondsIssuedDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_019c0020-9c23-7ddd-b21e-c10523d24488" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable_019c0020-9b5e-73c1-9334-5f42813ce8f4" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_019c0020-9c23-7ddd-b21e-c10523d24488" xlink:to="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable_019c0020-9b5e-73c1-9334-5f42813ce8f4" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BorrowingsByNameAxis_019c0020-9b5e-709e-9883-c1fa532f4378" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BorrowingsByNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable_019c0020-9b5e-73c1-9334-5f42813ce8f4" xlink:to="loc_ifrs-full_BorrowingsByNameAxis_019c0020-9b5e-709e-9883-c1fa532f4378" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BorrowingsByNameDomain_019c0020-9b5e-709e-9883-c1fa532f4378_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BorrowingsByNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_BorrowingsByNameAxis_019c0020-9b5e-709e-9883-c1fa532f4378" xlink:to="loc_ifrs-full_BorrowingsByNameDomain_019c0020-9b5e-709e-9883-c1fa532f4378_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BorrowingsByNameDomain_019c0020-9b5e-7053-bcdd-114541f7a4ea" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BorrowingsByNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_BorrowingsByNameAxis_019c0020-9b5e-709e-9883-c1fa532f4378" xlink:to="loc_ifrs-full_BorrowingsByNameDomain_019c0020-9b5e-7053-bcdd-114541f7a4ea" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_LettersOfCreditFacilitiesWithBanksMember_019c0020-9b5e-7ec5-afac-b4a4be3b0443" xlink:href="ttam-20251231.xsd#ttam_LettersOfCreditFacilitiesWithBanksMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BorrowingsByNameDomain_019c0020-9b5e-7053-bcdd-114541f7a4ea" xlink:to="loc_ttam_LettersOfCreditFacilitiesWithBanksMember_019c0020-9b5e-7ec5-afac-b4a4be3b0443" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_PerformanceBondFacilityMember_019c0020-9b5e-7c6c-8849-da8ce5b48f9b" xlink:href="ttam-20251231.xsd#ttam_PerformanceBondFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BorrowingsByNameDomain_019c0020-9b5e-7053-bcdd-114541f7a4ea" xlink:to="loc_ttam_PerformanceBondFacilityMember_019c0020-9b5e-7c6c-8849-da8ce5b48f9b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_BorrowingsIssuedInSupportOfAxis_019c0020-9b5e-79cf-aa04-5fc508211ca2" xlink:href="ttam-20251231.xsd#ttam_BorrowingsIssuedInSupportOfAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable_019c0020-9b5e-73c1-9334-5f42813ce8f4" xlink:to="loc_ttam_BorrowingsIssuedInSupportOfAxis_019c0020-9b5e-79cf-aa04-5fc508211ca2" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_BorrowingsIssuedInSupportOfDomain_019c0020-9b5e-79cf-aa04-5fc508211ca2_default" xlink:href="ttam-20251231.xsd#ttam_BorrowingsIssuedInSupportOfDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ttam_BorrowingsIssuedInSupportOfAxis_019c0020-9b5e-79cf-aa04-5fc508211ca2" xlink:to="loc_ttam_BorrowingsIssuedInSupportOfDomain_019c0020-9b5e-79cf-aa04-5fc508211ca2_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_BorrowingsIssuedInSupportOfDomain_019c0020-9b5e-7b9f-b3c0-04cf0cac139d" xlink:href="ttam-20251231.xsd#ttam_BorrowingsIssuedInSupportOfDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ttam_BorrowingsIssuedInSupportOfAxis_019c0020-9b5e-79cf-aa04-5fc508211ca2" xlink:to="loc_ttam_BorrowingsIssuedInSupportOfDomain_019c0020-9b5e-7b9f-b3c0-04cf0cac139d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_InsuranceProgramsMember_019c0020-9b5e-7e49-97fc-4e0a84218b7c" xlink:href="ttam-20251231.xsd#ttam_InsuranceProgramsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ttam_BorrowingsIssuedInSupportOfDomain_019c0020-9b5e-7b9f-b3c0-04cf0cac139d" xlink:to="loc_ttam_InsuranceProgramsMember_019c0020-9b5e-7e49-97fc-4e0a84218b7c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_PerformanceObligationsMember_019c0020-9b5e-74f0-b67d-9f21d3d0a504" xlink:href="ttam-20251231.xsd#ttam_PerformanceObligationsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ttam_BorrowingsIssuedInSupportOfDomain_019c0020-9b5e-7b9f-b3c0-04cf0cac139d" xlink:to="loc_ttam_PerformanceObligationsMember_019c0020-9b5e-74f0-b67d-9f21d3d0a504" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_OtherPaymentObligationsMember_019c0020-9b5e-7132-872e-680b1436a367" xlink:href="ttam-20251231.xsd#ttam_OtherPaymentObligationsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ttam_BorrowingsIssuedInSupportOfDomain_019c0020-9b5e-7b9f-b3c0-04cf0cac139d" xlink:to="loc_ttam_OtherPaymentObligationsMember_019c0020-9b5e-7132-872e-680b1436a367" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_ExcavationAndReclamationObligationsMember_019c0020-9b5e-7e6f-84f4-730415ade30d" xlink:href="ttam-20251231.xsd#ttam_ExcavationAndReclamationObligationsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ttam_BorrowingsIssuedInSupportOfDomain_019c0020-9b5e-7b9f-b3c0-04cf0cac139d" xlink:to="loc_ttam_ExcavationAndReclamationObligationsMember_019c0020-9b5e-7e6f-84f4-730415ade30d" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_SuretyBond1Member_019c0020-9b5e-737e-8f75-b1cb4ad74332" xlink:href="ttam-20251231.xsd#ttam_SuretyBond1Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ttam_BorrowingsIssuedInSupportOfDomain_019c0020-9b5e-7b9f-b3c0-04cf0cac139d" xlink:to="loc_ttam_SuretyBond1Member_019c0020-9b5e-737e-8f75-b1cb4ad74332" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_OtherPaymentObligationsMember_019c0020-9c23-7bed-8325-dcc9cf049efe" xlink:href="ttam-20251231.xsd#ttam_OtherPaymentObligationsMember"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_Borrowings_019c0020-9c23-7848-9dc3-926f421490f7" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_Borrowings"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_019c0020-9c23-7ddd-b21e-c10523d24488" xlink:to="loc_ifrs-full_Borrowings_019c0020-9c23-7848-9dc3-926f421490f7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_BorrowingsLettersOfCredit_019c0020-9c23-78fe-a070-a8df8ad13ffe" xlink:href="ttam-20251231.xsd#ttam_BorrowingsLettersOfCredit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_019c0020-9c23-7ddd-b21e-c10523d24488" xlink:to="loc_ttam_BorrowingsLettersOfCredit_019c0020-9c23-78fe-a070-a8df8ad13ffe" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_UndrawnBorrowingFacilities_019c0020-9c23-763d-a84d-6e7e4c80124e" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_UndrawnBorrowingFacilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_019c0020-9c23-7ddd-b21e-c10523d24488" xlink:to="loc_ifrs-full_UndrawnBorrowingFacilities_019c0020-9c23-763d-a84d-6e7e4c80124e" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.titanamerica.com/role/CreditfacilitiesandlongtermdebtReconciliationofChangesArisingFromFinancingActivitiesDetails" xlink:type="simple" xlink:href="ttam-20251231.xsd#CreditfacilitiesandlongtermdebtReconciliationofChangesArisingFromFinancingActivitiesDetails"/>
  <link:definitionLink xlink:role="http://www.titanamerica.com/role/CreditfacilitiesandlongtermdebtReconciliationofChangesArisingFromFinancingActivitiesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_019c0020-9c23-7eb8-8def-ba4262b12fcf" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable_019c0020-9c23-72f3-8c01-2bbcc49d6708" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_019c0020-9c23-7eb8-8def-ba4262b12fcf" xlink:to="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable_019c0020-9c23-72f3-8c01-2bbcc49d6708" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LiabilitiesArisingFromFinancingActivitiesAxis_019c0020-9c23-778d-8602-aa51a7ab7043" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_LiabilitiesArisingFromFinancingActivitiesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable_019c0020-9c23-72f3-8c01-2bbcc49d6708" xlink:to="loc_ifrs-full_LiabilitiesArisingFromFinancingActivitiesAxis_019c0020-9c23-778d-8602-aa51a7ab7043" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LiabilitiesArisingFromFinancingActivitiesDomain_019c0020-9c23-778d-8602-aa51a7ab7043_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_LiabilitiesArisingFromFinancingActivitiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_LiabilitiesArisingFromFinancingActivitiesAxis_019c0020-9c23-778d-8602-aa51a7ab7043" xlink:to="loc_ifrs-full_LiabilitiesArisingFromFinancingActivitiesDomain_019c0020-9c23-778d-8602-aa51a7ab7043_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LiabilitiesArisingFromFinancingActivitiesDomain_019c0020-9c23-7b00-b82b-0b17a2fd28cc" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_LiabilitiesArisingFromFinancingActivitiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_LiabilitiesArisingFromFinancingActivitiesAxis_019c0020-9c23-778d-8602-aa51a7ab7043" xlink:to="loc_ifrs-full_LiabilitiesArisingFromFinancingActivitiesDomain_019c0020-9c23-7b00-b82b-0b17a2fd28cc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_TotalChangeInLiabilitiesMember_019c0020-9c23-78b1-aaf5-04b1156e1eae" xlink:href="ttam-20251231.xsd#ttam_TotalChangeInLiabilitiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_LiabilitiesArisingFromFinancingActivitiesDomain_019c0020-9c23-7b00-b82b-0b17a2fd28cc" xlink:to="loc_ttam_TotalChangeInLiabilitiesMember_019c0020-9c23-78b1-aaf5-04b1156e1eae" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LongtermBorrowingsMember_019c0020-9c23-7963-8057-93aa9c2c3918" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_LongtermBorrowingsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ttam_TotalChangeInLiabilitiesMember_019c0020-9c23-78b1-aaf5-04b1156e1eae" xlink:to="loc_ifrs-full_LongtermBorrowingsMember_019c0020-9c23-7963-8057-93aa9c2c3918" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LeaseLiabilitiesMember_019c0020-9c23-7e99-acaa-32181c8282d3" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_LeaseLiabilitiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ttam_TotalChangeInLiabilitiesMember_019c0020-9c23-78b1-aaf5-04b1156e1eae" xlink:to="loc_ifrs-full_LeaseLiabilitiesMember_019c0020-9c23-7e99-acaa-32181c8282d3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AssetsHeldToHedgeLiabilitiesArisingFromFinancingActivitiesMember_019c0020-9c23-74fd-9a2c-42393f98443e" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_AssetsHeldToHedgeLiabilitiesArisingFromFinancingActivitiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_LiabilitiesArisingFromFinancingActivitiesDomain_019c0020-9c23-7b00-b82b-0b17a2fd28cc" xlink:to="loc_ifrs-full_AssetsHeldToHedgeLiabilitiesArisingFromFinancingActivitiesMember_019c0020-9c23-74fd-9a2c-42393f98443e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_FinancialInstrumentCollateralMember_019c0020-9c23-7b21-ac4c-32e90a664505" xlink:href="ttam-20251231.xsd#ttam_FinancialInstrumentCollateralMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_LiabilitiesArisingFromFinancingActivitiesDomain_019c0020-9c23-7b00-b82b-0b17a2fd28cc" xlink:to="loc_ttam_FinancialInstrumentCollateralMember_019c0020-9c23-7b21-ac4c-32e90a664505" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_OtherFinancingActivitiesMember_019c0020-9c23-70fb-ae83-fdcd53b0d370" xlink:href="ttam-20251231.xsd#ttam_OtherFinancingActivitiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_LiabilitiesArisingFromFinancingActivitiesDomain_019c0020-9c23-7b00-b82b-0b17a2fd28cc" xlink:to="loc_ttam_OtherFinancingActivitiesMember_019c0020-9c23-70fb-ae83-fdcd53b0d370" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_ChangesInLiabilitiesArisingFromFinancingActivitiesRollForward_019c0020-9c23-700b-9db6-5254fc8b2d26" xlink:href="ttam-20251231.xsd#ttam_ChangesInLiabilitiesArisingFromFinancingActivitiesRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_019c0020-9c23-7eb8-8def-ba4262b12fcf" xlink:to="loc_ttam_ChangesInLiabilitiesArisingFromFinancingActivitiesRollForward_019c0020-9c23-700b-9db6-5254fc8b2d26" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LiabilitiesArisingFromFinancingActivities_019c0020-9c23-799e-8b11-2b3e17801527" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_LiabilitiesArisingFromFinancingActivities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ttam_ChangesInLiabilitiesArisingFromFinancingActivitiesRollForward_019c0020-9c23-700b-9db6-5254fc8b2d26" xlink:to="loc_ifrs-full_LiabilitiesArisingFromFinancingActivities_019c0020-9c23-799e-8b11-2b3e17801527" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_IncreaseDecreaseThroughFinancingCashFlowsLiabilitiesArisingFromFinancingActivities_019c0020-9c23-71f6-a067-ad629a2c538a" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_IncreaseDecreaseThroughFinancingCashFlowsLiabilitiesArisingFromFinancingActivities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ttam_ChangesInLiabilitiesArisingFromFinancingActivitiesRollForward_019c0020-9c23-700b-9db6-5254fc8b2d26" xlink:to="loc_ifrs-full_IncreaseDecreaseThroughFinancingCashFlowsLiabilitiesArisingFromFinancingActivities_019c0020-9c23-71f6-a067-ad629a2c538a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_IncreaseDecreaseThroughEffectOfChangesInForeignExchangeRatesLiabilitiesArisingFromFinancingActivities_019c0020-9c23-791f-8bd7-8188e1379e1e" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_IncreaseDecreaseThroughEffectOfChangesInForeignExchangeRatesLiabilitiesArisingFromFinancingActivities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ttam_ChangesInLiabilitiesArisingFromFinancingActivitiesRollForward_019c0020-9c23-700b-9db6-5254fc8b2d26" xlink:to="loc_ifrs-full_IncreaseDecreaseThroughEffectOfChangesInForeignExchangeRatesLiabilitiesArisingFromFinancingActivities_019c0020-9c23-791f-8bd7-8188e1379e1e" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_IncreaseDecreaseThroughChangesInFairValuesLiabilitiesArisingFromFinancingActivities_019c0020-9c23-770a-8e72-c58f01a5b09b" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_IncreaseDecreaseThroughChangesInFairValuesLiabilitiesArisingFromFinancingActivities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ttam_ChangesInLiabilitiesArisingFromFinancingActivitiesRollForward_019c0020-9c23-700b-9db6-5254fc8b2d26" xlink:to="loc_ifrs-full_IncreaseDecreaseThroughChangesInFairValuesLiabilitiesArisingFromFinancingActivities_019c0020-9c23-770a-8e72-c58f01a5b09b" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_IncreaseDecreaseThroughInterestExpenseLiabilitiesArisingFromFinancingActivities_019c0020-9c23-7be9-add3-0ebd4476ed27" xlink:href="ttam-20251231.xsd#ttam_IncreaseDecreaseThroughInterestExpenseLiabilitiesArisingFromFinancingActivities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ttam_ChangesInLiabilitiesArisingFromFinancingActivitiesRollForward_019c0020-9c23-700b-9db6-5254fc8b2d26" xlink:to="loc_ttam_IncreaseDecreaseThroughInterestExpenseLiabilitiesArisingFromFinancingActivities_019c0020-9c23-7be9-add3-0ebd4476ed27" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_IncreaseThroughNewLeasesLiabilitiesArisingFromFinancingActivities_019c0020-9c23-7860-8480-32a8d40d0f5c" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_IncreaseThroughNewLeasesLiabilitiesArisingFromFinancingActivities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ttam_ChangesInLiabilitiesArisingFromFinancingActivitiesRollForward_019c0020-9c23-700b-9db6-5254fc8b2d26" xlink:to="loc_ifrs-full_IncreaseThroughNewLeasesLiabilitiesArisingFromFinancingActivities_019c0020-9c23-7860-8480-32a8d40d0f5c" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_IncreaseDecreaseThroughOtherChangesLiabilitiesArisingFromFinancingActivities_019c0020-9c23-712f-9120-6752c00976d7" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_IncreaseDecreaseThroughOtherChangesLiabilitiesArisingFromFinancingActivities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ttam_ChangesInLiabilitiesArisingFromFinancingActivitiesRollForward_019c0020-9c23-700b-9db6-5254fc8b2d26" xlink:to="loc_ifrs-full_IncreaseDecreaseThroughOtherChangesLiabilitiesArisingFromFinancingActivities_019c0020-9c23-712f-9120-6752c00976d7" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LiabilitiesArisingFromFinancingActivities_019c0020-9c23-7ab7-a9cb-6ced7232d4d2" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_LiabilitiesArisingFromFinancingActivities"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.titanamerica.com/role/IncometaxesScheduleofDeferredTaxAssetsandLiabilitiesDetails" xlink:type="simple" xlink:href="ttam-20251231.xsd#IncometaxesScheduleofDeferredTaxAssetsandLiabilitiesDetails"/>
  <link:definitionLink xlink:role="http://www.titanamerica.com/role/IncometaxesScheduleofDeferredTaxAssetsandLiabilitiesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsLineItems_019c0020-9c23-75cd-85b1-24b019c5cd11" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsTable_019c0020-9c23-75e7-8068-a9da91a05a3c" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsLineItems_019c0020-9c23-75cd-85b1-24b019c5cd11" xlink:to="loc_ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsTable_019c0020-9c23-75e7-8068-a9da91a05a3c" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxis_019c0020-9c23-7759-bfe8-005468b12eaa" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsTable_019c0020-9c23-75e7-8068-a9da91a05a3c" xlink:to="loc_ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxis_019c0020-9c23-7759-bfe8-005468b12eaa" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsDomain_019c0020-9c23-7759-bfe8-005468b12eaa_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxis_019c0020-9c23-7759-bfe8-005468b12eaa" xlink:to="loc_ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsDomain_019c0020-9c23-7759-bfe8-005468b12eaa_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsDomain_019c0020-9c23-7d4f-ba5e-4bdc10c35287" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxis_019c0020-9c23-7759-bfe8-005468b12eaa" xlink:to="loc_ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsDomain_019c0020-9c23-7d4f-ba5e-4bdc10c35287" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_ProvisionsAndAccruedExpensesRelatedTemporaryDifferencesMember_019c0020-9c23-7da5-beae-9eccda3d539f" xlink:href="ttam-20251231.xsd#ttam_ProvisionsAndAccruedExpensesRelatedTemporaryDifferencesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsDomain_019c0020-9c23-7d4f-ba5e-4bdc10c35287" xlink:to="loc_ttam_ProvisionsAndAccruedExpensesRelatedTemporaryDifferencesMember_019c0020-9c23-7da5-beae-9eccda3d539f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_LeaseLiabilitiesRelatedTemporaryDifferencesMember_019c0020-9c23-70c1-9af2-50df0e6ebf33" xlink:href="ttam-20251231.xsd#ttam_LeaseLiabilitiesRelatedTemporaryDifferencesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsDomain_019c0020-9c23-7d4f-ba5e-4bdc10c35287" xlink:to="loc_ttam_LeaseLiabilitiesRelatedTemporaryDifferencesMember_019c0020-9c23-70c1-9af2-50df0e6ebf33" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_AccountsReceivableValuationRelatedTemporaryDifferencesMember_019c0020-9c23-7727-a4fd-07d37c0564ce" xlink:href="ttam-20251231.xsd#ttam_AccountsReceivableValuationRelatedTemporaryDifferencesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsDomain_019c0020-9c23-7d4f-ba5e-4bdc10c35287" xlink:to="loc_ttam_AccountsReceivableValuationRelatedTemporaryDifferencesMember_019c0020-9c23-7727-a4fd-07d37c0564ce" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_InventoryValuationAndCostingRelatedTemporaryDifferencesMember_019c0020-9c23-7d61-9204-560047e17e64" xlink:href="ttam-20251231.xsd#ttam_InventoryValuationAndCostingRelatedTemporaryDifferencesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsDomain_019c0020-9c23-7d4f-ba5e-4bdc10c35287" xlink:to="loc_ttam_InventoryValuationAndCostingRelatedTemporaryDifferencesMember_019c0020-9c23-7d61-9204-560047e17e64" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_RetirementBenefitObligationsRelatedTemporaryDifferencesMember_019c0020-9c23-799b-b44d-8ee098018206" xlink:href="ttam-20251231.xsd#ttam_RetirementBenefitObligationsRelatedTemporaryDifferencesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsDomain_019c0020-9c23-7d4f-ba5e-4bdc10c35287" xlink:to="loc_ttam_RetirementBenefitObligationsRelatedTemporaryDifferencesMember_019c0020-9c23-799b-b44d-8ee098018206" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_UnrealizedLossOnDerivativeInstrumentsRelatedTemporaryDifferencesMember_019c0020-9c23-7905-9710-ba14e75112ee" xlink:href="ttam-20251231.xsd#ttam_UnrealizedLossOnDerivativeInstrumentsRelatedTemporaryDifferencesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsDomain_019c0020-9c23-7d4f-ba5e-4bdc10c35287" xlink:to="loc_ttam_UnrealizedLossOnDerivativeInstrumentsRelatedTemporaryDifferencesMember_019c0020-9c23-7905-9710-ba14e75112ee" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_UnrealizedLossOnDebtObligationsRelatedTemporaryDifferencesMember_019cb251-cdf5-75c4-8fff-c4fd3d0bdb56" xlink:href="ttam-20251231.xsd#ttam_UnrealizedLossOnDebtObligationsRelatedTemporaryDifferencesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsDomain_019c0020-9c23-7d4f-ba5e-4bdc10c35287" xlink:to="loc_ttam_UnrealizedLossOnDebtObligationsRelatedTemporaryDifferencesMember_019cb251-cdf5-75c4-8fff-c4fd3d0bdb56" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_OtherTemporaryDifferencesMember_019c0020-9c23-7447-bcd5-9ba8b9198b83" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_OtherTemporaryDifferencesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsDomain_019c0020-9c23-7d4f-ba5e-4bdc10c35287" xlink:to="loc_ifrs-full_OtherTemporaryDifferencesMember_019c0020-9c23-7447-bcd5-9ba8b9198b83" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_PropertyPlantAndEquipmentRelatedTemporaryDifferencesMember_019c0020-9c23-7ec4-837b-339819351f58" xlink:href="ttam-20251231.xsd#ttam_PropertyPlantAndEquipmentRelatedTemporaryDifferencesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsDomain_019c0020-9c23-7d4f-ba5e-4bdc10c35287" xlink:to="loc_ttam_PropertyPlantAndEquipmentRelatedTemporaryDifferencesMember_019c0020-9c23-7ec4-837b-339819351f58" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_GoodwillRelatedTemporaryDifferencesMember_019c0020-9c23-7a86-8454-fd24d710daf2" xlink:href="ttam-20251231.xsd#ttam_GoodwillRelatedTemporaryDifferencesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsDomain_019c0020-9c23-7d4f-ba5e-4bdc10c35287" xlink:to="loc_ttam_GoodwillRelatedTemporaryDifferencesMember_019c0020-9c23-7a86-8454-fd24d710daf2" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_MineralDepositsRelatedTemporaryDifferencesMember_019c0020-9c23-71bb-b24f-b94441f8885b" xlink:href="ttam-20251231.xsd#ttam_MineralDepositsRelatedTemporaryDifferencesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsDomain_019c0020-9c23-7d4f-ba5e-4bdc10c35287" xlink:to="loc_ttam_MineralDepositsRelatedTemporaryDifferencesMember_019c0020-9c23-71bb-b24f-b94441f8885b" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_RightOfUseAssetsRelatedTemporaryDifferencesMember_019c0020-9c23-7c99-8d8d-f5a5e60f3fa1" xlink:href="ttam-20251231.xsd#ttam_RightOfUseAssetsRelatedTemporaryDifferencesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsDomain_019c0020-9c23-7d4f-ba5e-4bdc10c35287" xlink:to="loc_ttam_RightOfUseAssetsRelatedTemporaryDifferencesMember_019c0020-9c23-7c99-8d8d-f5a5e60f3fa1" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_IntangibleAssetsRelatedTemporaryDifferencesMember_019c0020-9c23-7044-a0d5-1a38a8429acb" xlink:href="ttam-20251231.xsd#ttam_IntangibleAssetsRelatedTemporaryDifferencesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsDomain_019c0020-9c23-7d4f-ba5e-4bdc10c35287" xlink:to="loc_ttam_IntangibleAssetsRelatedTemporaryDifferencesMember_019c0020-9c23-7044-a0d5-1a38a8429acb" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DeferredTaxAssets_019c0020-9c23-7804-8572-865baf2dbc2c" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DeferredTaxAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsLineItems_019c0020-9c23-75cd-85b1-24b019c5cd11" xlink:to="loc_ifrs-full_DeferredTaxAssets_019c0020-9c23-7804-8572-865baf2dbc2c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DeferredTaxLiabilities_019c0020-9c23-7ab5-9c5e-5d97a3f58e60" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DeferredTaxLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsLineItems_019c0020-9c23-75cd-85b1-24b019c5cd11" xlink:to="loc_ifrs-full_DeferredTaxLiabilities_019c0020-9c23-7ab5-9c5e-5d97a3f58e60" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NetDeferredTaxLiabilities_019c0020-9c23-7d07-922f-f514b03487a4" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NetDeferredTaxLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsLineItems_019c0020-9c23-75cd-85b1-24b019c5cd11" xlink:to="loc_ifrs-full_NetDeferredTaxLiabilities_019c0020-9c23-7d07-922f-f514b03487a4" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.titanamerica.com/role/IncometaxesNarrativeDetails" xlink:type="simple" xlink:href="ttam-20251231.xsd#IncometaxesNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.titanamerica.com/role/IncometaxesNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsLineItems_019c0020-9c23-7649-a5ab-a5be1944cba0" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsTable_019c0020-9c23-7d4a-b22a-861c738a03ed" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsLineItems_019c0020-9c23-7649-a5ab-a5be1944cba0" xlink:to="loc_ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsTable_019c0020-9c23-7d4a-b22a-861c738a03ed" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_OperatingLossCarryforwardExpirationPeriodsAxis_019c0020-9c23-7bfd-a4a0-77544da09f36" xlink:href="ttam-20251231.xsd#ttam_OperatingLossCarryforwardExpirationPeriodsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsTable_019c0020-9c23-7d4a-b22a-861c738a03ed" xlink:to="loc_ttam_OperatingLossCarryforwardExpirationPeriodsAxis_019c0020-9c23-7bfd-a4a0-77544da09f36" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_OperatingLossCarryforwardExpirationPeriodsDomain_019c0020-9c23-7bfd-a4a0-77544da09f36_default" xlink:href="ttam-20251231.xsd#ttam_OperatingLossCarryforwardExpirationPeriodsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ttam_OperatingLossCarryforwardExpirationPeriodsAxis_019c0020-9c23-7bfd-a4a0-77544da09f36" xlink:to="loc_ttam_OperatingLossCarryforwardExpirationPeriodsDomain_019c0020-9c23-7bfd-a4a0-77544da09f36_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_OperatingLossCarryforwardExpirationPeriodsDomain_019c0020-9c23-7ef1-a417-d70db56e1d7e" xlink:href="ttam-20251231.xsd#ttam_OperatingLossCarryforwardExpirationPeriodsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ttam_OperatingLossCarryforwardExpirationPeriodsAxis_019c0020-9c23-7bfd-a4a0-77544da09f36" xlink:to="loc_ttam_OperatingLossCarryforwardExpirationPeriodsDomain_019c0020-9c23-7ef1-a417-d70db56e1d7e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_OperatingLossCarryforwardExpirationYearUnlimitedMember_019c0020-9c23-7b0a-9be0-c791d30773b7" xlink:href="ttam-20251231.xsd#ttam_OperatingLossCarryforwardExpirationYearUnlimitedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ttam_OperatingLossCarryforwardExpirationPeriodsDomain_019c0020-9c23-7ef1-a417-d70db56e1d7e" xlink:to="loc_ttam_OperatingLossCarryforwardExpirationYearUnlimitedMember_019c0020-9c23-7b0a-9be0-c791d30773b7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_OperatingLossCarryforwardVariousExpirationDatesMember_019c0020-9c23-7cfd-a5d3-d3d8ae565684" xlink:href="ttam-20251231.xsd#ttam_OperatingLossCarryforwardVariousExpirationDatesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ttam_OperatingLossCarryforwardExpirationPeriodsDomain_019c0020-9c23-7ef1-a417-d70db56e1d7e" xlink:to="loc_ttam_OperatingLossCarryforwardVariousExpirationDatesMember_019c0020-9c23-7cfd-a5d3-d3d8ae565684" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_UnusedTaxLossesForWhichNoDeferredTaxAssetRecognised_019c0020-9c23-7c7f-ab23-417511e68296" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_UnusedTaxLossesForWhichNoDeferredTaxAssetRecognised"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsLineItems_019c0020-9c23-7649-a5ab-a5be1944cba0" xlink:to="loc_ifrs-full_UnusedTaxLossesForWhichNoDeferredTaxAssetRecognised_019c0020-9c23-7c7f-ab23-417511e68296" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.titanamerica.com/role/RetirementBenefitObligationsDisclosureOfRetirementBenefitObligationsDetails" xlink:type="simple" xlink:href="ttam-20251231.xsd#RetirementBenefitObligationsDisclosureOfRetirementBenefitObligationsDetails"/>
  <link:definitionLink xlink:role="http://www.titanamerica.com/role/RetirementBenefitObligationsDisclosureOfRetirementBenefitObligationsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfDefinedBenefitPlansLineItems_019c0020-9c23-7d2e-8737-5da1419b80a0" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfDefinedBenefitPlansLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfDefinedBenefitPlansTable_019c0020-9c23-7c0e-a9f2-b6ac34013eb0" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfDefinedBenefitPlansTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfDefinedBenefitPlansLineItems_019c0020-9c23-7d2e-8737-5da1419b80a0" xlink:to="loc_ifrs-full_DisclosureOfDefinedBenefitPlansTable_019c0020-9c23-7c0e-a9f2-b6ac34013eb0" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DefinedBenefitPlansAxis_019c0020-9c23-775e-87ca-bdf498488823" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DefinedBenefitPlansAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfDefinedBenefitPlansTable_019c0020-9c23-7c0e-a9f2-b6ac34013eb0" xlink:to="loc_ifrs-full_DefinedBenefitPlansAxis_019c0020-9c23-775e-87ca-bdf498488823" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DefinedBenefitPlansDomain_019c0020-9c23-775e-87ca-bdf498488823_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DefinedBenefitPlansDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_DefinedBenefitPlansAxis_019c0020-9c23-775e-87ca-bdf498488823" xlink:to="loc_ifrs-full_DefinedBenefitPlansDomain_019c0020-9c23-775e-87ca-bdf498488823_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DefinedBenefitPlansDomain_019c0020-9c23-7587-9358-acc7ae9442dd" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DefinedBenefitPlansDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_DefinedBenefitPlansAxis_019c0020-9c23-775e-87ca-bdf498488823" xlink:to="loc_ifrs-full_DefinedBenefitPlansDomain_019c0020-9c23-7587-9358-acc7ae9442dd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_NonQualifiedDeferredCompensationPlanMember_019c0020-9c23-74e3-a103-6ec1a96fa359" xlink:href="ttam-20251231.xsd#ttam_NonQualifiedDeferredCompensationPlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DefinedBenefitPlansDomain_019c0020-9c23-7587-9358-acc7ae9442dd" xlink:to="loc_ttam_NonQualifiedDeferredCompensationPlanMember_019c0020-9c23-74e3-a103-6ec1a96fa359" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_PensionBenefitsMember_019c0020-9c23-7ac4-a2b8-34418f96b794" xlink:href="ttam-20251231.xsd#ttam_PensionBenefitsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DefinedBenefitPlansDomain_019c0020-9c23-7587-9358-acc7ae9442dd" xlink:to="loc_ttam_PensionBenefitsMember_019c0020-9c23-7ac4-a2b8-34418f96b794" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_OtherPostretirementBenefitsMember_019c0020-9c23-7ba9-b32f-cedf7c1151f8" xlink:href="ttam-20251231.xsd#ttam_OtherPostretirementBenefitsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DefinedBenefitPlansDomain_019c0020-9c23-7587-9358-acc7ae9442dd" xlink:to="loc_ttam_OtherPostretirementBenefitsMember_019c0020-9c23-7ba9-b32f-cedf7c1151f8" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_RetirementBenefitObligationsMember_019c0020-9c23-755a-a8d5-137a919ff69d" xlink:href="ttam-20251231.xsd#ttam_RetirementBenefitObligationsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DefinedBenefitPlansDomain_019c0020-9c23-7587-9358-acc7ae9442dd" xlink:to="loc_ttam_RetirementBenefitObligationsMember_019c0020-9c23-755a-a8d5-137a919ff69d" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_SurplusDeficitInPlan_019c0020-9c23-72fd-b046-e2520ef8a9b7" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_SurplusDeficitInPlan"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDefinedBenefitPlansLineItems_019c0020-9c23-7d2e-8737-5da1419b80a0" xlink:to="loc_ifrs-full_SurplusDeficitInPlan_019c0020-9c23-72fd-b046-e2520ef8a9b7" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.titanamerica.com/role/RetirementBenefitObligationsNarrativeDetails" xlink:type="simple" xlink:href="ttam-20251231.xsd#RetirementBenefitObligationsNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.titanamerica.com/role/RetirementBenefitObligationsNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfDefinedBenefitPlansLineItems_019c0020-9c23-75ab-82f5-ccb3acc3a0ee" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfDefinedBenefitPlansLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfDefinedBenefitPlansTable_019c0020-9c23-7c52-82a1-487d9273ec05" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfDefinedBenefitPlansTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfDefinedBenefitPlansLineItems_019c0020-9c23-75ab-82f5-ccb3acc3a0ee" xlink:to="loc_ifrs-full_DisclosureOfDefinedBenefitPlansTable_019c0020-9c23-7c52-82a1-487d9273ec05" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CharacteristicsOfDefinedBenefitPlansAxis_019c0020-9c23-7608-872f-2e6d79455257" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CharacteristicsOfDefinedBenefitPlansAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfDefinedBenefitPlansTable_019c0020-9c23-7c52-82a1-487d9273ec05" xlink:to="loc_ifrs-full_CharacteristicsOfDefinedBenefitPlansAxis_019c0020-9c23-7608-872f-2e6d79455257" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CharacteristicsOfDefinedBenefitPlansDomain_019c0020-9c23-7608-872f-2e6d79455257_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CharacteristicsOfDefinedBenefitPlansDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_CharacteristicsOfDefinedBenefitPlansAxis_019c0020-9c23-7608-872f-2e6d79455257" xlink:to="loc_ifrs-full_CharacteristicsOfDefinedBenefitPlansDomain_019c0020-9c23-7608-872f-2e6d79455257_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CharacteristicsOfDefinedBenefitPlansDomain_019c0020-9c23-7a21-8d3f-6da90b12a600" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CharacteristicsOfDefinedBenefitPlansDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_CharacteristicsOfDefinedBenefitPlansAxis_019c0020-9c23-7608-872f-2e6d79455257" xlink:to="loc_ifrs-full_CharacteristicsOfDefinedBenefitPlansDomain_019c0020-9c23-7a21-8d3f-6da90b12a600" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_PensionDefinedBenefitPlansMember_019c0020-9c23-7ffe-9515-d66bea3e9b0f" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_PensionDefinedBenefitPlansMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_CharacteristicsOfDefinedBenefitPlansDomain_019c0020-9c23-7a21-8d3f-6da90b12a600" xlink:to="loc_ifrs-full_PensionDefinedBenefitPlansMember_019c0020-9c23-7ffe-9515-d66bea3e9b0f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RangeAxis_019c0020-9c23-782e-8dac-32753d5bdbc9" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfDefinedBenefitPlansTable_019c0020-9c23-7c52-82a1-487d9273ec05" xlink:to="loc_ifrs-full_RangeAxis_019c0020-9c23-782e-8dac-32753d5bdbc9" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RangeDomain_019c0020-9c23-782e-8dac-32753d5bdbc9_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_RangeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_RangeAxis_019c0020-9c23-782e-8dac-32753d5bdbc9" xlink:to="loc_ifrs-full_RangeDomain_019c0020-9c23-782e-8dac-32753d5bdbc9_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RangeDomain_019c0020-9c23-7a43-b996-141e1e90ed2c" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_RangeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_RangeAxis_019c0020-9c23-782e-8dac-32753d5bdbc9" xlink:to="loc_ifrs-full_RangeDomain_019c0020-9c23-7a43-b996-141e1e90ed2c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_019c0020-9c23-7c6d-8176-1de95dc0a0d9" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_RangeDomain_019c0020-9c23-7a43-b996-141e1e90ed2c" xlink:to="loc_srt_MinimumMember_019c0020-9c23-7c6d-8176-1de95dc0a0d9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_019c0020-9c23-7acc-af7d-8343f618de00" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_RangeDomain_019c0020-9c23-7a43-b996-141e1e90ed2c" xlink:to="loc_srt_MaximumMember_019c0020-9c23-7acc-af7d-8343f618de00" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_NonQualifiedDeferredCompensationPlanDeferredAmountEligibleCompensation_019c0020-9c23-726d-a38f-33ae107f997c" xlink:href="ttam-20251231.xsd#ttam_NonQualifiedDeferredCompensationPlanDeferredAmountEligibleCompensation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDefinedBenefitPlansLineItems_019c0020-9c23-75ab-82f5-ccb3acc3a0ee" xlink:to="loc_ttam_NonQualifiedDeferredCompensationPlanDeferredAmountEligibleCompensation_019c0020-9c23-726d-a38f-33ae107f997c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_FixedIncomeInstrumentsAmountContributedToFairValueOfPlanAssetsAllocationPercentage_019c0020-9c23-791e-9123-3346f413587d" xlink:href="ttam-20251231.xsd#ttam_FixedIncomeInstrumentsAmountContributedToFairValueOfPlanAssetsAllocationPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDefinedBenefitPlansLineItems_019c0020-9c23-75ab-82f5-ccb3acc3a0ee" xlink:to="loc_ttam_FixedIncomeInstrumentsAmountContributedToFairValueOfPlanAssetsAllocationPercentage_019c0020-9c23-791e-9123-3346f413587d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_OtherInvestmentInstrumentsAmountContributedToFairValueOfPlanAssetsAllocationPercentage_019c0020-9c23-7972-94bc-f688526949ef" xlink:href="ttam-20251231.xsd#ttam_OtherInvestmentInstrumentsAmountContributedToFairValueOfPlanAssetsAllocationPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDefinedBenefitPlansLineItems_019c0020-9c23-75ab-82f5-ccb3acc3a0ee" xlink:to="loc_ttam_OtherInvestmentInstrumentsAmountContributedToFairValueOfPlanAssetsAllocationPercentage_019c0020-9c23-7972-94bc-f688526949ef" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_EquityInstrumentsPercentageContributedToFairValueOfPlanAssets_019c0020-9c23-77da-a3f1-47eb837567b6" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_EquityInstrumentsPercentageContributedToFairValueOfPlanAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDefinedBenefitPlansLineItems_019c0020-9c23-75ab-82f5-ccb3acc3a0ee" xlink:to="loc_ifrs-full_EquityInstrumentsPercentageContributedToFairValueOfPlanAssets_019c0020-9c23-77da-a3f1-47eb837567b6" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ActuarialAssumptionOfDiscountRates_019c0020-9c23-7f71-b741-0c82203228dd" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ActuarialAssumptionOfDiscountRates"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDefinedBenefitPlansLineItems_019c0020-9c23-75ab-82f5-ccb3acc3a0ee" xlink:to="loc_ifrs-full_ActuarialAssumptionOfDiscountRates_019c0020-9c23-7f71-b741-0c82203228dd" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_DefinedContributionPlanCompanyMatchEligibleContributions_019c0020-9c23-71ee-b1e4-9758e1393fc6" xlink:href="ttam-20251231.xsd#ttam_DefinedContributionPlanCompanyMatchEligibleContributions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDefinedBenefitPlansLineItems_019c0020-9c23-75ab-82f5-ccb3acc3a0ee" xlink:to="loc_ttam_DefinedContributionPlanCompanyMatchEligibleContributions_019c0020-9c23-71ee-b1e4-9758e1393fc6" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_DefinedContributionPlanCompanyMatchEligibleWages_019c0020-9c23-7adc-aa69-1b8d868eece2" xlink:href="ttam-20251231.xsd#ttam_DefinedContributionPlanCompanyMatchEligibleWages"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDefinedBenefitPlansLineItems_019c0020-9c23-75ab-82f5-ccb3acc3a0ee" xlink:to="loc_ttam_DefinedContributionPlanCompanyMatchEligibleWages_019c0020-9c23-7adc-aa69-1b8d868eece2" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_PostemploymentBenefitExpenseDefinedContributionPlans_019c0020-9c23-7f5f-b534-756728e73ee4" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_PostemploymentBenefitExpenseDefinedContributionPlans"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDefinedBenefitPlansLineItems_019c0020-9c23-75ab-82f5-ccb3acc3a0ee" xlink:to="loc_ifrs-full_PostemploymentBenefitExpenseDefinedContributionPlans_019c0020-9c23-7f5f-b534-756728e73ee4" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_PostEmploymentBenefitIncomeFromForfeituresDefinedContributionPlans_019c0020-9c23-7fad-be47-b658fcae3a79" xlink:href="ttam-20251231.xsd#ttam_PostEmploymentBenefitIncomeFromForfeituresDefinedContributionPlans"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDefinedBenefitPlansLineItems_019c0020-9c23-75ab-82f5-ccb3acc3a0ee" xlink:to="loc_ttam_PostEmploymentBenefitIncomeFromForfeituresDefinedContributionPlans_019c0020-9c23-7fad-be47-b658fcae3a79" xlink:type="arc" order="8"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.titanamerica.com/role/RetirementBenefitObligationsSensitivityAnalysisDetails" xlink:type="simple" xlink:href="ttam-20251231.xsd#RetirementBenefitObligationsSensitivityAnalysisDetails"/>
  <link:definitionLink xlink:role="http://www.titanamerica.com/role/RetirementBenefitObligationsSensitivityAnalysisDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfDefinedBenefitPlansLineItems_019c0020-9c23-7bd2-838b-5cfe9356d5ee" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfDefinedBenefitPlansLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfDefinedBenefitPlansTable_019c0020-9c23-7791-bcd4-a5034a367c46" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfDefinedBenefitPlansTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfDefinedBenefitPlansLineItems_019c0020-9c23-7bd2-838b-5cfe9356d5ee" xlink:to="loc_ifrs-full_DisclosureOfDefinedBenefitPlansTable_019c0020-9c23-7791-bcd4-a5034a367c46" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ActuarialAssumptionsAxis_019c0020-9c23-703b-b151-dfd476697d85" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ActuarialAssumptionsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfDefinedBenefitPlansTable_019c0020-9c23-7791-bcd4-a5034a367c46" xlink:to="loc_ifrs-full_ActuarialAssumptionsAxis_019c0020-9c23-703b-b151-dfd476697d85" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ActuarialAssumptionsDomain_019c0020-9c23-703b-b151-dfd476697d85_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ActuarialAssumptionsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_ActuarialAssumptionsAxis_019c0020-9c23-703b-b151-dfd476697d85" xlink:to="loc_ifrs-full_ActuarialAssumptionsDomain_019c0020-9c23-703b-b151-dfd476697d85_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ActuarialAssumptionsDomain_019c0020-9c23-7392-a3ca-0b45646758d5" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ActuarialAssumptionsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_ActuarialAssumptionsAxis_019c0020-9c23-703b-b151-dfd476697d85" xlink:to="loc_ifrs-full_ActuarialAssumptionsDomain_019c0020-9c23-7392-a3ca-0b45646758d5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_ActuarialRateOfExpectedIncreaseToCostOfCoveredHealthCareBenefitsMember_019c0020-9c23-78f4-8e31-08be6fc9c3a9" xlink:href="ttam-20251231.xsd#ttam_ActuarialRateOfExpectedIncreaseToCostOfCoveredHealthCareBenefitsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ActuarialAssumptionsDomain_019c0020-9c23-7392-a3ca-0b45646758d5" xlink:to="loc_ttam_ActuarialRateOfExpectedIncreaseToCostOfCoveredHealthCareBenefitsMember_019c0020-9c23-78f4-8e31-08be6fc9c3a9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ActuarialAssumptionOfDiscountRatesMember_019c0020-9c23-7711-a92e-fa4c31f72bc7" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ActuarialAssumptionOfDiscountRatesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ActuarialAssumptionsDomain_019c0020-9c23-7392-a3ca-0b45646758d5" xlink:to="loc_ifrs-full_ActuarialAssumptionOfDiscountRatesMember_019c0020-9c23-7711-a92e-fa4c31f72bc7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_PercentageOfReasonablyPossibleDecreaseInActuarialAssumption_019c0020-9c23-71b3-9d90-040baf3beeaf" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_PercentageOfReasonablyPossibleDecreaseInActuarialAssumption"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDefinedBenefitPlansLineItems_019c0020-9c23-7bd2-838b-5cfe9356d5ee" xlink:to="loc_ifrs-full_PercentageOfReasonablyPossibleDecreaseInActuarialAssumption_019c0020-9c23-71b3-9d90-040baf3beeaf" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_PercentageOfReasonablyPossibleIncreaseInActuarialAssumption_019c0020-9c23-79d6-a65f-b4a96ede0710" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_PercentageOfReasonablyPossibleIncreaseInActuarialAssumption"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDefinedBenefitPlansLineItems_019c0020-9c23-7bd2-838b-5cfe9356d5ee" xlink:to="loc_ifrs-full_PercentageOfReasonablyPossibleIncreaseInActuarialAssumption_019c0020-9c23-79d6-a65f-b4a96ede0710" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_IncreaseDecreaseInDefinedBenefitPlanCurrentServiceAndInterestCostDueToReasonablyPossibleIncreaseInActuarialAssumption_019c0020-9c23-7b89-98c0-fe305cfcda22" xlink:href="ttam-20251231.xsd#ttam_IncreaseDecreaseInDefinedBenefitPlanCurrentServiceAndInterestCostDueToReasonablyPossibleIncreaseInActuarialAssumption"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDefinedBenefitPlansLineItems_019c0020-9c23-7bd2-838b-5cfe9356d5ee" xlink:to="loc_ttam_IncreaseDecreaseInDefinedBenefitPlanCurrentServiceAndInterestCostDueToReasonablyPossibleIncreaseInActuarialAssumption_019c0020-9c23-7b89-98c0-fe305cfcda22" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_IncreaseDecreaseInDefinedBenefitPlanCurrentServiceAndInterestCostDueToReasonablyPossibleDecreaseInActuarialAssumption_019c0020-9c23-7ace-b15e-f0972d68aa31" xlink:href="ttam-20251231.xsd#ttam_IncreaseDecreaseInDefinedBenefitPlanCurrentServiceAndInterestCostDueToReasonablyPossibleDecreaseInActuarialAssumption"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDefinedBenefitPlansLineItems_019c0020-9c23-7bd2-838b-5cfe9356d5ee" xlink:to="loc_ttam_IncreaseDecreaseInDefinedBenefitPlanCurrentServiceAndInterestCostDueToReasonablyPossibleDecreaseInActuarialAssumption_019c0020-9c23-7ace-b15e-f0972d68aa31" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_IncreaseDecreaseInDefinedBenefitPlanOtherPostRetirementBenefitObligationsDueToReasonablyPossibleIncreaseInActuarialAssumption_019c0020-9c23-7bd4-9ce3-24731efd1476" xlink:href="ttam-20251231.xsd#ttam_IncreaseDecreaseInDefinedBenefitPlanOtherPostRetirementBenefitObligationsDueToReasonablyPossibleIncreaseInActuarialAssumption"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDefinedBenefitPlansLineItems_019c0020-9c23-7bd2-838b-5cfe9356d5ee" xlink:to="loc_ttam_IncreaseDecreaseInDefinedBenefitPlanOtherPostRetirementBenefitObligationsDueToReasonablyPossibleIncreaseInActuarialAssumption_019c0020-9c23-7bd4-9ce3-24731efd1476" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_IncreaseDecreaseInDefinedBenefitPlanOtherPostRetirementBenefitObligationsDueToReasonablyPossibleDecreaseInActuarialAssumption_019c0020-9c23-7459-8740-089817a415d1" xlink:href="ttam-20251231.xsd#ttam_IncreaseDecreaseInDefinedBenefitPlanOtherPostRetirementBenefitObligationsDueToReasonablyPossibleDecreaseInActuarialAssumption"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDefinedBenefitPlansLineItems_019c0020-9c23-7bd2-838b-5cfe9356d5ee" xlink:to="loc_ttam_IncreaseDecreaseInDefinedBenefitPlanOtherPostRetirementBenefitObligationsDueToReasonablyPossibleDecreaseInActuarialAssumption_019c0020-9c23-7459-8740-089817a415d1" xlink:type="arc" order="5"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.titanamerica.com/role/StockBasedCompensationPlanNarrativeDetails" xlink:type="simple" xlink:href="ttam-20251231.xsd#StockBasedCompensationPlanNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.titanamerica.com/role/StockBasedCompensationPlanNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems_019c8a56-3caa-732b-bb23-790576fcf507" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable_019c8a56-3caa-7dea-9a42-f3dc5236dc76" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems_019c8a56-3caa-732b-bb23-790576fcf507" xlink:to="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable_019c8a56-3caa-7dea-9a42-f3dc5236dc76" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TypesOfSharebasedPaymentArrangementsAxis_019c8a56-3caa-7913-bed0-5be1b071e6eb" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TypesOfSharebasedPaymentArrangementsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable_019c8a56-3caa-7dea-9a42-f3dc5236dc76" xlink:to="loc_ifrs-full_TypesOfSharebasedPaymentArrangementsAxis_019c8a56-3caa-7913-bed0-5be1b071e6eb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TypesOfSharebasedPaymentArrangementsDomain_019c8a56-3caa-7913-bed0-5be1b071e6eb_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TypesOfSharebasedPaymentArrangementsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_TypesOfSharebasedPaymentArrangementsAxis_019c8a56-3caa-7913-bed0-5be1b071e6eb" xlink:to="loc_ifrs-full_TypesOfSharebasedPaymentArrangementsDomain_019c8a56-3caa-7913-bed0-5be1b071e6eb_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TypesOfSharebasedPaymentArrangementsDomain_019c8a56-3caa-714c-914f-ff5e1ea5e619" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TypesOfSharebasedPaymentArrangementsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_TypesOfSharebasedPaymentArrangementsAxis_019c8a56-3caa-7913-bed0-5be1b071e6eb" xlink:to="loc_ifrs-full_TypesOfSharebasedPaymentArrangementsDomain_019c8a56-3caa-714c-914f-ff5e1ea5e619" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_OmnibusIncentivePlan2025Member_019c8a56-3caa-7415-804b-f06f19fc5f39" xlink:href="ttam-20251231.xsd#ttam_OmnibusIncentivePlan2025Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_TypesOfSharebasedPaymentArrangementsDomain_019c8a56-3caa-714c-914f-ff5e1ea5e619" xlink:to="loc_ttam_OmnibusIncentivePlan2025Member_019c8a56-3caa-7415-804b-f06f19fc5f39" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RestrictedShareUnitsMember_019c8a56-9fe9-7b4b-8211-dbbba43a4396" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_RestrictedShareUnitsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_TypesOfSharebasedPaymentArrangementsDomain_019c8a56-3caa-714c-914f-ff5e1ea5e619" xlink:to="loc_ifrs-full_RestrictedShareUnitsMember_019c8a56-9fe9-7b4b-8211-dbbba43a4396" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_PerformanceShareUnitsMember_019c8a56-9fe9-72a5-b3cf-c73cc03b6b0e" xlink:href="ttam-20251231.xsd#ttam_PerformanceShareUnitsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_TypesOfSharebasedPaymentArrangementsDomain_019c8a56-3caa-714c-914f-ff5e1ea5e619" xlink:to="loc_ttam_PerformanceShareUnitsMember_019c8a56-9fe9-72a5-b3cf-c73cc03b6b0e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RangeAxis_019cc440-2b95-7d07-8948-7cae6ba61a6c" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable_019c8a56-3caa-7dea-9a42-f3dc5236dc76" xlink:to="loc_ifrs-full_RangeAxis_019cc440-2b95-7d07-8948-7cae6ba61a6c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RangeDomain_019cc440-2b95-7d07-8948-7cae6ba61a6c_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_RangeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_RangeAxis_019cc440-2b95-7d07-8948-7cae6ba61a6c" xlink:to="loc_ifrs-full_RangeDomain_019cc440-2b95-7d07-8948-7cae6ba61a6c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RangeDomain_019cc440-2b95-7b91-8f5c-45a6b91c2b09" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_RangeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_RangeAxis_019cc440-2b95-7d07-8948-7cae6ba61a6c" xlink:to="loc_ifrs-full_RangeDomain_019cc440-2b95-7b91-8f5c-45a6b91c2b09" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BottomOfRangeMember_019cc440-40db-7aa8-838a-9c8d28af00e4" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BottomOfRangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_RangeDomain_019cc440-2b95-7b91-8f5c-45a6b91c2b09" xlink:to="loc_ifrs-full_BottomOfRangeMember_019cc440-40db-7aa8-838a-9c8d28af00e4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TopOfRangeMember_019cc440-53e5-7325-b2f6-4b0ccf13d922" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TopOfRangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_RangeDomain_019cc440-2b95-7b91-8f5c-45a6b91c2b09" xlink:to="loc_ifrs-full_TopOfRangeMember_019cc440-53e5-7325-b2f6-4b0ccf13d922" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NumberOfShareOptionsGrantedInSharebasedPaymentArrangement_019c8a56-3cab-7acc-8e3c-7099ae4f208e" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NumberOfShareOptionsGrantedInSharebasedPaymentArrangement"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems_019c8a56-3caa-732b-bb23-790576fcf507" xlink:to="loc_ifrs-full_NumberOfShareOptionsGrantedInSharebasedPaymentArrangement_019c8a56-3cab-7acc-8e3c-7099ae4f208e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_VestingRequirementsForShareBasedPaymentArrangementVestingPeriod_019d07d2-bbbd-7b1b-a1bd-03f3d948eb61" xlink:href="ttam-20251231.xsd#ttam_VestingRequirementsForShareBasedPaymentArrangementVestingPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems_019c8a56-3caa-732b-bb23-790576fcf507" xlink:to="loc_ttam_VestingRequirementsForShareBasedPaymentArrangementVestingPeriod_019d07d2-bbbd-7b1b-a1bd-03f3d948eb61" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ExpenseFromSharebasedPaymentTransactionsInWhichGoodsOrServicesReceivedDidNotQualifyForRecognitionAsAssets_019cd7be-b6bb-70cc-9f98-f79ad8f64b69" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ExpenseFromSharebasedPaymentTransactionsInWhichGoodsOrServicesReceivedDidNotQualifyForRecognitionAsAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems_019c8a56-3caa-732b-bb23-790576fcf507" xlink:to="loc_ifrs-full_ExpenseFromSharebasedPaymentTransactionsInWhichGoodsOrServicesReceivedDidNotQualifyForRecognitionAsAssets_019cd7be-b6bb-70cc-9f98-f79ad8f64b69" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_UnrecognizedExpenseFromShareBasedPaymentTransactionsWithEmployees_019c8a56-9fe9-70aa-9456-b77a116116e7" xlink:href="ttam-20251231.xsd#ttam_UnrecognizedExpenseFromShareBasedPaymentTransactionsWithEmployees"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems_019c8a56-3caa-732b-bb23-790576fcf507" xlink:to="loc_ttam_UnrecognizedExpenseFromShareBasedPaymentTransactionsWithEmployees_019c8a56-9fe9-70aa-9456-b77a116116e7" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_WeightedAverageRemainingContractualLifeOfOutstandingShareOptions2019_019c8a56-9fe9-7dfd-8ba0-392a71db2f4c" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_WeightedAverageRemainingContractualLifeOfOutstandingShareOptions2019"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems_019c8a56-3caa-732b-bb23-790576fcf507" xlink:to="loc_ifrs-full_WeightedAverageRemainingContractualLifeOfOutstandingShareOptions2019_019c8a56-9fe9-7dfd-8ba0-392a71db2f4c" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_ShareBasedPaymentArrangementsNumberOfSharesAwardedAsPercentageOfTargetAward_019c8a56-9fe9-70f2-a3b1-ac836065d129" xlink:href="ttam-20251231.xsd#ttam_ShareBasedPaymentArrangementsNumberOfSharesAwardedAsPercentageOfTargetAward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems_019c8a56-3caa-732b-bb23-790576fcf507" xlink:to="loc_ttam_ShareBasedPaymentArrangementsNumberOfSharesAwardedAsPercentageOfTargetAward_019c8a56-9fe9-70f2-a3b1-ac836065d129" xlink:type="arc" order="5"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.titanamerica.com/role/StockBasedCompensationPlanDisclosureofnumberandweightedaverageexercisepricesofotherequityinstrumentsDetails" xlink:type="simple" xlink:href="ttam-20251231.xsd#StockBasedCompensationPlanDisclosureofnumberandweightedaverageexercisepricesofotherequityinstrumentsDetails"/>
  <link:definitionLink xlink:role="http://www.titanamerica.com/role/StockBasedCompensationPlanDisclosureofnumberandweightedaverageexercisepricesofotherequityinstrumentsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems_019c8a59-a176-7a22-a310-60f5f169681c" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable_019c8a59-a176-7117-abd7-d48d46f7fbe4" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems_019c8a59-a176-7a22-a310-60f5f169681c" xlink:to="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable_019c8a59-a176-7117-abd7-d48d46f7fbe4" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TypesOfSharebasedPaymentArrangementsAxis_019c8a59-a176-7dfa-a746-7c4b0eb5d29e" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TypesOfSharebasedPaymentArrangementsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable_019c8a59-a176-7117-abd7-d48d46f7fbe4" xlink:to="loc_ifrs-full_TypesOfSharebasedPaymentArrangementsAxis_019c8a59-a176-7dfa-a746-7c4b0eb5d29e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TypesOfSharebasedPaymentArrangementsDomain_019c8a59-a176-7dfa-a746-7c4b0eb5d29e_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TypesOfSharebasedPaymentArrangementsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_TypesOfSharebasedPaymentArrangementsAxis_019c8a59-a176-7dfa-a746-7c4b0eb5d29e" xlink:to="loc_ifrs-full_TypesOfSharebasedPaymentArrangementsDomain_019c8a59-a176-7dfa-a746-7c4b0eb5d29e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TypesOfSharebasedPaymentArrangementsDomain_019c8a59-a176-700f-a353-a488eca660f6" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TypesOfSharebasedPaymentArrangementsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_TypesOfSharebasedPaymentArrangementsAxis_019c8a59-a176-7dfa-a746-7c4b0eb5d29e" xlink:to="loc_ifrs-full_TypesOfSharebasedPaymentArrangementsDomain_019c8a59-a176-700f-a353-a488eca660f6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RestrictedShareUnitsMember_019c8a59-a176-7b37-bc9f-eca3de0b56e1" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_RestrictedShareUnitsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_TypesOfSharebasedPaymentArrangementsDomain_019c8a59-a176-700f-a353-a488eca660f6" xlink:to="loc_ifrs-full_RestrictedShareUnitsMember_019c8a59-a176-7b37-bc9f-eca3de0b56e1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_PerformanceShareUnitsMember_019c8f41-13a2-7743-b981-fae5e120015f" xlink:href="ttam-20251231.xsd#ttam_PerformanceShareUnitsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_TypesOfSharebasedPaymentArrangementsDomain_019c8a59-a176-700f-a353-a488eca660f6" xlink:to="loc_ttam_PerformanceShareUnitsMember_019c8f41-13a2-7743-b981-fae5e120015f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NumberOfOtherEquityInstrumentsOutstandingInSharebasedPaymentArrangement_019c8f47-84c6-7230-a504-61d9817279a0" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NumberOfOtherEquityInstrumentsOutstandingInSharebasedPaymentArrangement"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems_019c8a59-a176-7a22-a310-60f5f169681c" xlink:to="loc_ifrs-full_NumberOfOtherEquityInstrumentsOutstandingInSharebasedPaymentArrangement_019c8f47-84c6-7230-a504-61d9817279a0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NumberOfInstrumentsOtherEquityInstrumentsGranted_019c8f47-84c6-7a76-bbd8-55e181d76f73" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NumberOfInstrumentsOtherEquityInstrumentsGranted"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems_019c8a59-a176-7a22-a310-60f5f169681c" xlink:to="loc_ifrs-full_NumberOfInstrumentsOtherEquityInstrumentsGranted_019c8f47-84c6-7a76-bbd8-55e181d76f73" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NumberOfOtherEquityInstrumentsExercisedOrVestedInSharebasedPaymentArrangement_019c8f47-84c6-7e9a-a9d0-2c0ee81a667d" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NumberOfOtherEquityInstrumentsExercisedOrVestedInSharebasedPaymentArrangement"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems_019c8a59-a176-7a22-a310-60f5f169681c" xlink:to="loc_ifrs-full_NumberOfOtherEquityInstrumentsExercisedOrVestedInSharebasedPaymentArrangement_019c8f47-84c6-7e9a-a9d0-2c0ee81a667d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NumberOfOtherEquityInstrumentsForfeitedInSharebasedPaymentArrangement_019c8f47-84c6-7120-8bd0-3de6c3d26149" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NumberOfOtherEquityInstrumentsForfeitedInSharebasedPaymentArrangement"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems_019c8a59-a176-7a22-a310-60f5f169681c" xlink:to="loc_ifrs-full_NumberOfOtherEquityInstrumentsForfeitedInSharebasedPaymentArrangement_019c8f47-84c6-7120-8bd0-3de6c3d26149" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NumberOfOtherEquityInstrumentsOutstandingInSharebasedPaymentArrangement_019c8f55-396f-7148-948c-fe3cd867b8f2" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NumberOfOtherEquityInstrumentsOutstandingInSharebasedPaymentArrangement"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_WeightedAverageExercisePriceOfOtherEquityInstrumentsOutstandingInSharebasedPaymentArrangement2019_019c8f56-20df-706e-9376-dcf5d766fe53" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_WeightedAverageExercisePriceOfOtherEquityInstrumentsOutstandingInSharebasedPaymentArrangement2019"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems_019c8a59-a176-7a22-a310-60f5f169681c" xlink:to="loc_ifrs-full_WeightedAverageExercisePriceOfOtherEquityInstrumentsOutstandingInSharebasedPaymentArrangement2019_019c8f56-20df-706e-9376-dcf5d766fe53" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_WeightedAverageExercisePriceOfOtherEquityInstrumentsGrantedInSharebasedPaymentArrangement2019_019c8f56-20df-748c-be10-34a956d8655f" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_WeightedAverageExercisePriceOfOtherEquityInstrumentsGrantedInSharebasedPaymentArrangement2019"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems_019c8a59-a176-7a22-a310-60f5f169681c" xlink:to="loc_ifrs-full_WeightedAverageExercisePriceOfOtherEquityInstrumentsGrantedInSharebasedPaymentArrangement2019_019c8f56-20df-748c-be10-34a956d8655f" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_WeightedAverageExercisePriceOfOtherEquityInstrumentsExercisedOrVestedInSharebasedPaymentArrangement2019_019c8f56-20df-7746-b8c3-555a6968e8d9" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_WeightedAverageExercisePriceOfOtherEquityInstrumentsExercisedOrVestedInSharebasedPaymentArrangement2019"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems_019c8a59-a176-7a22-a310-60f5f169681c" xlink:to="loc_ifrs-full_WeightedAverageExercisePriceOfOtherEquityInstrumentsExercisedOrVestedInSharebasedPaymentArrangement2019_019c8f56-20df-7746-b8c3-555a6968e8d9" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_WeightedAverageExercisePriceOfOtherEquityInstrumentsForfeitedInSharebasedPaymentArrangement2019_019c8f56-20df-7143-9d11-278bfb24084d" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_WeightedAverageExercisePriceOfOtherEquityInstrumentsForfeitedInSharebasedPaymentArrangement2019"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems_019c8a59-a176-7a22-a310-60f5f169681c" xlink:to="loc_ifrs-full_WeightedAverageExercisePriceOfOtherEquityInstrumentsForfeitedInSharebasedPaymentArrangement2019_019c8f56-20df-7143-9d11-278bfb24084d" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_WeightedAverageExercisePriceOfOtherEquityInstrumentsOutstandingInSharebasedPaymentArrangement2019_019c8f66-3a52-7ee1-a64a-8ca6458e336f" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_WeightedAverageExercisePriceOfOtherEquityInstrumentsOutstandingInSharebasedPaymentArrangement2019"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.titanamerica.com/role/ProvisionsRollForwardofProvisionsDetails" xlink:type="simple" xlink:href="ttam-20251231.xsd#ProvisionsRollForwardofProvisionsDetails"/>
  <link:definitionLink xlink:role="http://www.titanamerica.com/role/ProvisionsRollForwardofProvisionsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfOtherProvisionsLineItems_019c0020-9c23-7356-89f6-137b02a1fc91" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfOtherProvisionsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfOtherProvisionsTable_019c0020-9c23-73f5-bc9c-faf601bdebc5" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfOtherProvisionsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfOtherProvisionsLineItems_019c0020-9c23-7356-89f6-137b02a1fc91" xlink:to="loc_ifrs-full_DisclosureOfOtherProvisionsTable_019c0020-9c23-73f5-bc9c-faf601bdebc5" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfProvisionsAxis_019c0020-9c23-7ebf-92ad-155c5a820251" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfProvisionsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfOtherProvisionsTable_019c0020-9c23-73f5-bc9c-faf601bdebc5" xlink:to="loc_ifrs-full_ClassesOfProvisionsAxis_019c0020-9c23-7ebf-92ad-155c5a820251" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfOtherProvisionsDomain_019c0020-9c23-7ebf-92ad-155c5a820251_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfOtherProvisionsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_ClassesOfProvisionsAxis_019c0020-9c23-7ebf-92ad-155c5a820251" xlink:to="loc_ifrs-full_ClassesOfOtherProvisionsDomain_019c0020-9c23-7ebf-92ad-155c5a820251_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfOtherProvisionsDomain_019c0020-9c23-7bb5-8fc5-bda09805fd65" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfOtherProvisionsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_ClassesOfProvisionsAxis_019c0020-9c23-7ebf-92ad-155c5a820251" xlink:to="loc_ifrs-full_ClassesOfOtherProvisionsDomain_019c0020-9c23-7bb5-8fc5-bda09805fd65" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ProvisionForDecommissioningRestorationAndRehabilitationCostsMember_019c0020-9c23-7c0e-abd4-321dc2f2ab35" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ProvisionForDecommissioningRestorationAndRehabilitationCostsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfOtherProvisionsDomain_019c0020-9c23-7bb5-8fc5-bda09805fd65" xlink:to="loc_ifrs-full_ProvisionForDecommissioningRestorationAndRehabilitationCostsMember_019c0020-9c23-7c0e-abd4-321dc2f2ab35" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_OtherEnvironmentRelatedProvisionMember_019c0020-9c23-753f-94ff-677a535db112" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_OtherEnvironmentRelatedProvisionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfOtherProvisionsDomain_019c0020-9c23-7bb5-8fc5-bda09805fd65" xlink:to="loc_ifrs-full_OtherEnvironmentRelatedProvisionMember_019c0020-9c23-753f-94ff-677a535db112" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_ProvisionForEquipmentRemovalMember_019c0020-9c23-73a0-aef3-c0e4dee16fe3" xlink:href="ttam-20251231.xsd#ttam_ProvisionForEquipmentRemovalMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfOtherProvisionsDomain_019c0020-9c23-7bb5-8fc5-bda09805fd65" xlink:to="loc_ttam_ProvisionForEquipmentRemovalMember_019c0020-9c23-73a0-aef3-c0e4dee16fe3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_InsuranceReservesProvisionMember_019c0020-9c23-77e5-a92c-093144aa54fb" xlink:href="ttam-20251231.xsd#ttam_InsuranceReservesProvisionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfOtherProvisionsDomain_019c0020-9c23-7bb5-8fc5-bda09805fd65" xlink:to="loc_ttam_InsuranceReservesProvisionMember_019c0020-9c23-77e5-a92c-093144aa54fb" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_LeaseReturnObligationsProvisionMember_019c0020-9c23-735a-b4d6-c437cbecabbb" xlink:href="ttam-20251231.xsd#ttam_LeaseReturnObligationsProvisionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfOtherProvisionsDomain_019c0020-9c23-7bb5-8fc5-bda09805fd65" xlink:to="loc_ttam_LeaseReturnObligationsProvisionMember_019c0020-9c23-735a-b4d6-c437cbecabbb" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_SalesAndUseTaxProvisionMember_019c0020-9c23-776b-a1e7-e319b5279b8d" xlink:href="ttam-20251231.xsd#ttam_SalesAndUseTaxProvisionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfOtherProvisionsDomain_019c0020-9c23-7bb5-8fc5-bda09805fd65" xlink:to="loc_ttam_SalesAndUseTaxProvisionMember_019c0020-9c23-776b-a1e7-e319b5279b8d" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LegalProceedingsProvisionMember_019c0020-9c23-7d41-87c2-6f687b946a34" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_LegalProceedingsProvisionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfOtherProvisionsDomain_019c0020-9c23-7bb5-8fc5-bda09805fd65" xlink:to="loc_ifrs-full_LegalProceedingsProvisionMember_019c0020-9c23-7d41-87c2-6f687b946a34" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_IncomeStatementLocation1Axis_019c0020-9c23-7e4e-aa4f-0b1c467abf6c" xlink:href="ttam-20251231.xsd#ttam_IncomeStatementLocation1Axis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfOtherProvisionsTable_019c0020-9c23-73f5-bc9c-faf601bdebc5" xlink:to="loc_ttam_IncomeStatementLocation1Axis_019c0020-9c23-7e4e-aa4f-0b1c467abf6c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_IncomeStatementLocation1Domain_019c0020-9c23-7e4e-aa4f-0b1c467abf6c_default" xlink:href="ttam-20251231.xsd#ttam_IncomeStatementLocation1Domain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ttam_IncomeStatementLocation1Axis_019c0020-9c23-7e4e-aa4f-0b1c467abf6c" xlink:to="loc_ttam_IncomeStatementLocation1Domain_019c0020-9c23-7e4e-aa4f-0b1c467abf6c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_IncomeStatementLocation1Domain_019c0020-9c23-7ce1-b829-c1b407965231" xlink:href="ttam-20251231.xsd#ttam_IncomeStatementLocation1Domain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ttam_IncomeStatementLocation1Axis_019c0020-9c23-7e4e-aa4f-0b1c467abf6c" xlink:to="loc_ttam_IncomeStatementLocation1Domain_019c0020-9c23-7ce1-b829-c1b407965231" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_ProfitLossFromOperatingActivitiesMember_019c0020-9c23-7c88-99b3-62c897c8697d" xlink:href="ttam-20251231.xsd#ttam_ProfitLossFromOperatingActivitiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ttam_IncomeStatementLocation1Domain_019c0020-9c23-7ce1-b829-c1b407965231" xlink:to="loc_ttam_ProfitLossFromOperatingActivitiesMember_019c0020-9c23-7c88-99b3-62c897c8697d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_FinanceCostsMember_019c0020-9c23-74d2-b8c9-9a6428edcfa5" xlink:href="ttam-20251231.xsd#ttam_FinanceCostsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ttam_IncomeStatementLocation1Domain_019c0020-9c23-7ce1-b829-c1b407965231" xlink:to="loc_ttam_FinanceCostsMember_019c0020-9c23-74d2-b8c9-9a6428edcfa5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_ChangesInProvisionRollForward_019c0020-9c23-7aa0-a3ee-c522b7784e39" xlink:href="ttam-20251231.xsd#ttam_ChangesInProvisionRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfOtherProvisionsLineItems_019c0020-9c23-7356-89f6-137b02a1fc91" xlink:to="loc_ttam_ChangesInProvisionRollForward_019c0020-9c23-7aa0-a3ee-c522b7784e39" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_Provisions_019c0020-9c23-7e04-b6c9-274aea824aab" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_Provisions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ttam_ChangesInProvisionRollForward_019c0020-9c23-7aa0-a3ee-c522b7784e39" xlink:to="loc_ifrs-full_Provisions_019c0020-9c23-7e04-b6c9-274aea824aab" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_ProvisionCharges_019c0020-9c23-706f-bbd2-41ccfcf15c9b" xlink:href="ttam-20251231.xsd#ttam_ProvisionCharges"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ttam_ChangesInProvisionRollForward_019c0020-9c23-7aa0-a3ee-c522b7784e39" xlink:to="loc_ttam_ProvisionCharges_019c0020-9c23-706f-bbd2-41ccfcf15c9b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_ProvisionCashPayments_019c0020-9c23-7e28-a397-ba62a2903fdc" xlink:href="ttam-20251231.xsd#ttam_ProvisionCashPayments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ttam_ChangesInProvisionRollForward_019c0020-9c23-7aa0-a3ee-c522b7784e39" xlink:to="loc_ttam_ProvisionCashPayments_019c0020-9c23-7e28-a397-ba62a2903fdc" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_OtherIncreaseDecreaseInProvisions_019c0020-9c23-7bfe-b61f-794ec6cf8f96" xlink:href="ttam-20251231.xsd#ttam_OtherIncreaseDecreaseInProvisions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ttam_ChangesInProvisionRollForward_019c0020-9c23-7aa0-a3ee-c522b7784e39" xlink:to="loc_ttam_OtherIncreaseDecreaseInProvisions_019c0020-9c23-7bfe-b61f-794ec6cf8f96" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_Provisions_019c0020-9c23-7e2d-ad94-6dc5e9aae1e7" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_Provisions"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.titanamerica.com/role/ProvisionsNarrativeDetails" xlink:type="simple" xlink:href="ttam-20251231.xsd#ProvisionsNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.titanamerica.com/role/ProvisionsNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfOtherProvisionsLineItems_019c0020-9c23-7da5-8ed0-b389aa40e759" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfOtherProvisionsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfOtherProvisionsTable_019c0020-9c23-73a5-90ef-432f80d800cd" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfOtherProvisionsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfOtherProvisionsLineItems_019c0020-9c23-7da5-8ed0-b389aa40e759" xlink:to="loc_ifrs-full_DisclosureOfOtherProvisionsTable_019c0020-9c23-73a5-90ef-432f80d800cd" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RangeAxis_019c0020-9c23-7e97-92b7-8d9f9ff97405" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfOtherProvisionsTable_019c0020-9c23-73a5-90ef-432f80d800cd" xlink:to="loc_ifrs-full_RangeAxis_019c0020-9c23-7e97-92b7-8d9f9ff97405" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RangeDomain_019c0020-9c23-7e97-92b7-8d9f9ff97405_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_RangeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_RangeAxis_019c0020-9c23-7e97-92b7-8d9f9ff97405" xlink:to="loc_ifrs-full_RangeDomain_019c0020-9c23-7e97-92b7-8d9f9ff97405_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RangeDomain_019c0020-9c23-7db3-80cf-814f7e090158" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_RangeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_RangeAxis_019c0020-9c23-7e97-92b7-8d9f9ff97405" xlink:to="loc_ifrs-full_RangeDomain_019c0020-9c23-7db3-80cf-814f7e090158" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BottomOfRangeMember_019c0020-9c23-727a-836c-bf3732a89016" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BottomOfRangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_RangeDomain_019c0020-9c23-7db3-80cf-814f7e090158" xlink:to="loc_ifrs-full_BottomOfRangeMember_019c0020-9c23-727a-836c-bf3732a89016" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TopOfRangeMember_019c0020-9c23-7412-a9dd-163e18bf1391" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TopOfRangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_RangeDomain_019c0020-9c23-7db3-80cf-814f7e090158" xlink:to="loc_ifrs-full_TopOfRangeMember_019c0020-9c23-7412-a9dd-163e18bf1391" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfProvisionsAxis_019c0020-9c23-7fa0-af6c-13454fe2b36f" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfProvisionsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfOtherProvisionsTable_019c0020-9c23-73a5-90ef-432f80d800cd" xlink:to="loc_ifrs-full_ClassesOfProvisionsAxis_019c0020-9c23-7fa0-af6c-13454fe2b36f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfOtherProvisionsDomain_019c0020-9c23-7fa0-af6c-13454fe2b36f_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfOtherProvisionsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_ClassesOfProvisionsAxis_019c0020-9c23-7fa0-af6c-13454fe2b36f" xlink:to="loc_ifrs-full_ClassesOfOtherProvisionsDomain_019c0020-9c23-7fa0-af6c-13454fe2b36f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfOtherProvisionsDomain_019c0020-9c23-7ded-b3b0-b955e3d503b5" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfOtherProvisionsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_ClassesOfProvisionsAxis_019c0020-9c23-7fa0-af6c-13454fe2b36f" xlink:to="loc_ifrs-full_ClassesOfOtherProvisionsDomain_019c0020-9c23-7ded-b3b0-b955e3d503b5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_RestorationEnvironmentalEquipmentRemovalProvisionMember_019c0020-9c23-72b4-ab24-48ef8981f61c" xlink:href="ttam-20251231.xsd#ttam_RestorationEnvironmentalEquipmentRemovalProvisionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfOtherProvisionsDomain_019c0020-9c23-7ded-b3b0-b955e3d503b5" xlink:to="loc_ttam_RestorationEnvironmentalEquipmentRemovalProvisionMember_019c0020-9c23-72b4-ab24-48ef8981f61c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_SalesAndUseTaxProvisionMember_019c0020-9c23-7cf0-91b0-1d8117769c7d" xlink:href="ttam-20251231.xsd#ttam_SalesAndUseTaxProvisionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfOtherProvisionsDomain_019c0020-9c23-7ded-b3b0-b955e3d503b5" xlink:to="loc_ttam_SalesAndUseTaxProvisionMember_019c0020-9c23-7cf0-91b0-1d8117769c7d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_ProvisionsExpectedPeriodOfUse_019c0020-9c23-7176-a056-ecd2d10cbd10" xlink:href="ttam-20251231.xsd#ttam_ProvisionsExpectedPeriodOfUse"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfOtherProvisionsLineItems_019c0020-9c23-7da5-8ed0-b389aa40e759" xlink:to="loc_ttam_ProvisionsExpectedPeriodOfUse_019c0020-9c23-7176-a056-ecd2d10cbd10" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_IncreaseDecreaseInProvisions_019c0020-9c23-758c-a6c2-0b7bcdea8305" xlink:href="ttam-20251231.xsd#ttam_IncreaseDecreaseInProvisions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfOtherProvisionsLineItems_019c0020-9c23-7da5-8ed0-b389aa40e759" xlink:to="loc_ttam_IncreaseDecreaseInProvisions_019c0020-9c23-758c-a6c2-0b7bcdea8305" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.titanamerica.com/role/RelatedPartyTransactionsTransactionsBetweenRelatedPartiesDetails" xlink:type="simple" xlink:href="ttam-20251231.xsd#RelatedPartyTransactionsTransactionsBetweenRelatedPartiesDetails"/>
  <link:definitionLink xlink:role="http://www.titanamerica.com/role/RelatedPartyTransactionsTransactionsBetweenRelatedPartiesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_019c0020-9c23-7f36-93fd-24bbb459d08a" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesTable_019c0020-9c23-730b-872f-ee9207b021a8" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_019c0020-9c23-7f36-93fd-24bbb459d08a" xlink:to="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesTable_019c0020-9c23-730b-872f-ee9207b021a8" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_019c0020-9c23-7d85-8198-89718d4a72e7" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesTable_019c0020-9c23-730b-872f-ee9207b021a8" xlink:to="loc_srt_ProductOrServiceAxis_019c0020-9c23-7d85-8198-89718d4a72e7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_019c0020-9c23-7d85-8198-89718d4a72e7_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_019c0020-9c23-7d85-8198-89718d4a72e7" xlink:to="loc_srt_ProductsAndServicesDomain_019c0020-9c23-7d85-8198-89718d4a72e7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_019c0020-9c23-74c3-aacb-25aed44c1e34" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_019c0020-9c23-7d85-8198-89718d4a72e7" xlink:to="loc_srt_ProductsAndServicesDomain_019c0020-9c23-74c3-aacb-25aed44c1e34" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_FinancingServicesMember_019c0020-9c23-714c-81b6-1287481c9089" xlink:href="ttam-20251231.xsd#ttam_FinancingServicesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_019c0020-9c23-74c3-aacb-25aed44c1e34" xlink:to="loc_ttam_FinancingServicesMember_019c0020-9c23-714c-81b6-1287481c9089" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_CementMember_019c0020-9c23-71ac-984f-2eda054e7630" xlink:href="ttam-20251231.xsd#ttam_CementMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_019c0020-9c23-74c3-aacb-25aed44c1e34" xlink:to="loc_ttam_CementMember_019c0020-9c23-71ac-984f-2eda054e7630" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_ManagementFeeMember_019c0020-9c23-7b9b-ad65-3d49427fbb53" xlink:href="ttam-20251231.xsd#ttam_ManagementFeeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_019c0020-9c23-74c3-aacb-25aed44c1e34" xlink:to="loc_ttam_ManagementFeeMember_019c0020-9c23-7b9b-ad65-3d49427fbb53" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_OtherGoodsAndServicesMember_019c0020-9c23-7f24-9755-ea6565886847" xlink:href="ttam-20251231.xsd#ttam_OtherGoodsAndServicesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_019c0020-9c23-74c3-aacb-25aed44c1e34" xlink:to="loc_ttam_OtherGoodsAndServicesMember_019c0020-9c23-7f24-9755-ea6565886847" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_PurchasesOfGoodsRelatedPartyTransactions_019c0020-9c23-7922-b021-4b6f0bade0f8" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_PurchasesOfGoodsRelatedPartyTransactions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_019c0020-9c23-7f36-93fd-24bbb459d08a" xlink:to="loc_ifrs-full_PurchasesOfGoodsRelatedPartyTransactions_019c0020-9c23-7922-b021-4b6f0bade0f8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AmountsPayableRelatedPartyTransactions_019c0020-9c23-7fb1-8681-8ce699606ed2" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_AmountsPayableRelatedPartyTransactions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_019c0020-9c23-7f36-93fd-24bbb459d08a" xlink:to="loc_ifrs-full_AmountsPayableRelatedPartyTransactions_019c0020-9c23-7fb1-8681-8ce699606ed2" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.titanamerica.com/role/RelatedPartyTransactionsNarrativeDetails" xlink:type="simple" xlink:href="ttam-20251231.xsd#RelatedPartyTransactionsNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.titanamerica.com/role/RelatedPartyTransactionsNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_019c0020-9c23-7f96-8ef9-2da0b91266fd" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesTable_019c0020-9c23-7b24-bb9d-dedcb1db1b4c" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_019c0020-9c23-7f96-8ef9-2da0b91266fd" xlink:to="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesTable_019c0020-9c23-7b24-bb9d-dedcb1db1b4c" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_RelatedPartyNameAxis_019c0020-9c23-7c09-b80b-694c8b2793ad" xlink:href="ttam-20251231.xsd#ttam_RelatedPartyNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesTable_019c0020-9c23-7b24-bb9d-dedcb1db1b4c" xlink:to="loc_ttam_RelatedPartyNameAxis_019c0020-9c23-7c09-b80b-694c8b2793ad" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_RelatedPartyNameDomain_019c0020-9c23-7c09-b80b-694c8b2793ad_default" xlink:href="ttam-20251231.xsd#ttam_RelatedPartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ttam_RelatedPartyNameAxis_019c0020-9c23-7c09-b80b-694c8b2793ad" xlink:to="loc_ttam_RelatedPartyNameDomain_019c0020-9c23-7c09-b80b-694c8b2793ad_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_RelatedPartyNameDomain_019c0020-9c23-72da-b60f-27cbcef54153" xlink:href="ttam-20251231.xsd#ttam_RelatedPartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ttam_RelatedPartyNameAxis_019c0020-9c23-7c09-b80b-694c8b2793ad" xlink:to="loc_ttam_RelatedPartyNameDomain_019c0020-9c23-72da-b60f-27cbcef54153" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_TitanCementCompanyS.A.AndColumbusPropertiesBV.Member_019c0020-9c23-7f35-924e-49641f1b8700" xlink:href="ttam-20251231.xsd#ttam_TitanCementCompanyS.A.AndColumbusPropertiesBV.Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ttam_RelatedPartyNameDomain_019c0020-9c23-72da-b60f-27cbcef54153" xlink:to="loc_ttam_TitanCementCompanyS.A.AndColumbusPropertiesBV.Member_019c0020-9c23-7f35-924e-49641f1b8700" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_TitanCementCompanyS.A.Member_019c0020-9c23-7b05-ad87-172a9598bf31" xlink:href="ttam-20251231.xsd#ttam_TitanCementCompanyS.A.Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ttam_RelatedPartyNameDomain_019c0020-9c23-72da-b60f-27cbcef54153" xlink:to="loc_ttam_TitanCementCompanyS.A.Member_019c0020-9c23-7b05-ad87-172a9598bf31" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_ColumbusPropertiesBV.Member_019c0020-9c23-7ab7-9419-e0e6ddfbc013" xlink:href="ttam-20251231.xsd#ttam_ColumbusPropertiesBV.Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ttam_RelatedPartyNameDomain_019c0020-9c23-72da-b60f-27cbcef54153" xlink:to="loc_ttam_ColumbusPropertiesBV.Member_019c0020-9c23-7ab7-9419-e0e6ddfbc013" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TypesOfSharebasedPaymentArrangementsAxis_019c0020-9c23-7639-8300-6f85005ceb91" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TypesOfSharebasedPaymentArrangementsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesTable_019c0020-9c23-7b24-bb9d-dedcb1db1b4c" xlink:to="loc_ifrs-full_TypesOfSharebasedPaymentArrangementsAxis_019c0020-9c23-7639-8300-6f85005ceb91" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TypesOfSharebasedPaymentArrangementsDomain_019c0020-9c23-7639-8300-6f85005ceb91_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TypesOfSharebasedPaymentArrangementsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_TypesOfSharebasedPaymentArrangementsAxis_019c0020-9c23-7639-8300-6f85005ceb91" xlink:to="loc_ifrs-full_TypesOfSharebasedPaymentArrangementsDomain_019c0020-9c23-7639-8300-6f85005ceb91_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TypesOfSharebasedPaymentArrangementsDomain_019c0020-9c23-700f-917b-0fabd6dbddc3" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TypesOfSharebasedPaymentArrangementsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_TypesOfSharebasedPaymentArrangementsAxis_019c0020-9c23-7639-8300-6f85005ceb91" xlink:to="loc_ifrs-full_TypesOfSharebasedPaymentArrangementsDomain_019c0020-9c23-700f-917b-0fabd6dbddc3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_TCIShadowSharesMember_019c0020-9c23-7321-ac76-5ba23ded751b" xlink:href="ttam-20251231.xsd#ttam_TCIShadowSharesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_TypesOfSharebasedPaymentArrangementsDomain_019c0020-9c23-700f-917b-0fabd6dbddc3" xlink:to="loc_ttam_TCIShadowSharesMember_019c0020-9c23-7321-ac76-5ba23ded751b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ComponentsOfEquityAxis_019c0020-9c23-7f66-ab1a-74630b956f36" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ComponentsOfEquityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesTable_019c0020-9c23-7b24-bb9d-dedcb1db1b4c" xlink:to="loc_ifrs-full_ComponentsOfEquityAxis_019c0020-9c23-7f66-ab1a-74630b956f36" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ComponentsOfEquityDomain_019c0020-9c23-7f66-ab1a-74630b956f36_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ComponentsOfEquityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_ComponentsOfEquityAxis_019c0020-9c23-7f66-ab1a-74630b956f36" xlink:to="loc_ifrs-full_ComponentsOfEquityDomain_019c0020-9c23-7f66-ab1a-74630b956f36_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ComponentsOfEquityDomain_019c0020-9c23-7a10-a907-cdd733398629" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ComponentsOfEquityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_ComponentsOfEquityAxis_019c0020-9c23-7f66-ab1a-74630b956f36" xlink:to="loc_ifrs-full_ComponentsOfEquityDomain_019c0020-9c23-7a10-a907-cdd733398629" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_SharePremiumMember_019c0020-9c23-7e50-a784-13958a3fddd3" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_SharePremiumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ComponentsOfEquityDomain_019c0020-9c23-7a10-a907-cdd733398629" xlink:to="loc_ifrs-full_SharePremiumMember_019c0020-9c23-7e50-a784-13958a3fddd3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_DividendsDeclaredAndPaid_019c0020-9c23-7c82-a340-9870f54c209d" xlink:href="ttam-20251231.xsd#ttam_DividendsDeclaredAndPaid"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_019c0020-9c23-7f96-8ef9-2da0b91266fd" xlink:to="loc_ttam_DividendsDeclaredAndPaid_019c0020-9c23-7c82-a340-9870f54c209d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ReductionOfIssuedCapital_019c0020-9c23-7645-8413-e71464cd715a" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ReductionOfIssuedCapital"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_019c0020-9c23-7f96-8ef9-2da0b91266fd" xlink:to="loc_ifrs-full_ReductionOfIssuedCapital_019c0020-9c23-7645-8413-e71464cd715a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_SharePremium_019c0020-9c23-7e9c-a651-924d6d9d0792" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_SharePremium"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_019c0020-9c23-7f96-8ef9-2da0b91266fd" xlink:to="loc_ifrs-full_SharePremium_019c0020-9c23-7e9c-a651-924d6d9d0792" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DividendsRecognisedAsDistributionsToOwnersPerShare_019cd7ce-1fa3-7395-969e-710f7ce402f7" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DividendsRecognisedAsDistributionsToOwnersPerShare"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_019c0020-9c23-7f96-8ef9-2da0b91266fd" xlink:to="loc_ifrs-full_DividendsRecognisedAsDistributionsToOwnersPerShare_019cd7ce-1fa3-7395-969e-710f7ce402f7" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DividendsPaid_019cd7ce-1fa3-7dba-8471-cd8312f28a62" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DividendsPaid"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_019c0020-9c23-7f96-8ef9-2da0b91266fd" xlink:to="loc_ifrs-full_DividendsPaid_019cd7ce-1fa3-7dba-8471-cd8312f28a62" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_FederalTaxAmount_019c0020-9c23-7713-bf4d-b53aaeea0022" xlink:href="ttam-20251231.xsd#ttam_FederalTaxAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_019c0020-9c23-7f96-8ef9-2da0b91266fd" xlink:to="loc_ttam_FederalTaxAmount_019c0020-9c23-7713-bf4d-b53aaeea0022" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_GeneralAndAdministrativeExpense_019c0020-9c23-719c-b148-a9dbc1935b3d" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_GeneralAndAdministrativeExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_019c0020-9c23-7f96-8ef9-2da0b91266fd" xlink:to="loc_ifrs-full_GeneralAndAdministrativeExpense_019c0020-9c23-719c-b148-a9dbc1935b3d" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_RelatedPartyRechargeSharePremium_019c0020-9c23-70e4-8118-b5ddc4524f9f" xlink:href="ttam-20251231.xsd#ttam_RelatedPartyRechargeSharePremium"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_019c0020-9c23-7f96-8ef9-2da0b91266fd" xlink:to="loc_ttam_RelatedPartyRechargeSharePremium_019c0020-9c23-70e4-8118-b5ddc4524f9f" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_RelatedPartyRechargeSharePremiumOperatingActivities_019c0020-9c23-7b13-a7dd-2e02a19ddc98" xlink:href="ttam-20251231.xsd#ttam_RelatedPartyRechargeSharePremiumOperatingActivities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_019c0020-9c23-7f96-8ef9-2da0b91266fd" xlink:to="loc_ttam_RelatedPartyRechargeSharePremiumOperatingActivities_019c0020-9c23-7b13-a7dd-2e02a19ddc98" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_RelatedPartyRechargeSharePremiumFinancingActivities_019c0020-9c23-76b6-80cd-0d9fa217b75d" xlink:href="ttam-20251231.xsd#ttam_RelatedPartyRechargeSharePremiumFinancingActivities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_019c0020-9c23-7f96-8ef9-2da0b91266fd" xlink:to="loc_ttam_RelatedPartyRechargeSharePremiumFinancingActivities_019c0020-9c23-76b6-80cd-0d9fa217b75d" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ParValuePerShare_019c0020-9c23-7fe2-ae34-fa176461f1c1" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ParValuePerShare"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_019c0020-9c23-7f96-8ef9-2da0b91266fd" xlink:to="loc_ifrs-full_ParValuePerShare_019c0020-9c23-7fe2-ae34-fa176461f1c1" xlink:type="arc" order="10"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.titanamerica.com/role/RelatedPartyTransactionsShadowShareActivityDetails" xlink:type="simple" xlink:href="ttam-20251231.xsd#RelatedPartyTransactionsShadowShareActivityDetails"/>
  <link:definitionLink xlink:role="http://www.titanamerica.com/role/RelatedPartyTransactionsShadowShareActivityDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_019c0020-9c23-7ee8-9077-4762f05657c8" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesTable_019c0020-9c23-7a93-8cdd-af235ffe70c2" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_019c0020-9c23-7ee8-9077-4762f05657c8" xlink:to="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesTable_019c0020-9c23-7a93-8cdd-af235ffe70c2" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfShareCapitalAxis_019c0020-9c23-781d-ad0b-4dc3a19c7702" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfShareCapitalAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesTable_019c0020-9c23-7a93-8cdd-af235ffe70c2" xlink:to="loc_ifrs-full_ClassesOfShareCapitalAxis_019c0020-9c23-781d-ad0b-4dc3a19c7702" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfShareCapitalDomain_019c0020-9c23-781d-ad0b-4dc3a19c7702_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfShareCapitalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_ClassesOfShareCapitalAxis_019c0020-9c23-781d-ad0b-4dc3a19c7702" xlink:to="loc_ifrs-full_ClassesOfShareCapitalDomain_019c0020-9c23-781d-ad0b-4dc3a19c7702_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfShareCapitalDomain_019c0020-9c23-7308-b3f3-fdc13fa2e592" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfShareCapitalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_ClassesOfShareCapitalAxis_019c0020-9c23-781d-ad0b-4dc3a19c7702" xlink:to="loc_ifrs-full_ClassesOfShareCapitalDomain_019c0020-9c23-7308-b3f3-fdc13fa2e592" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_TCIShadowSharesMember_019c0020-9c23-7c78-9b0a-e404e86f506f" xlink:href="ttam-20251231.xsd#ttam_TCIShadowSharesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfShareCapitalDomain_019c0020-9c23-7308-b3f3-fdc13fa2e592" xlink:to="loc_ttam_TCIShadowSharesMember_019c0020-9c23-7c78-9b0a-e404e86f506f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NumberOfOtherEquityInstrumentsOutstandingInSharebasedPaymentArrangement_019c0020-9c23-7583-a9a5-04886be65815" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NumberOfOtherEquityInstrumentsOutstandingInSharebasedPaymentArrangement"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_019c0020-9c23-7ee8-9077-4762f05657c8" xlink:to="loc_ifrs-full_NumberOfOtherEquityInstrumentsOutstandingInSharebasedPaymentArrangement_019c0020-9c23-7583-a9a5-04886be65815" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_NumberOfOtherEquityInstrumentsGrantedInShareBasedPaymentArrangementIncludingTransfers_019c0020-9c23-73f1-9c7f-cb5c944b97e1" xlink:href="ttam-20251231.xsd#ttam_NumberOfOtherEquityInstrumentsGrantedInShareBasedPaymentArrangementIncludingTransfers"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_019c0020-9c23-7ee8-9077-4762f05657c8" xlink:to="loc_ttam_NumberOfOtherEquityInstrumentsGrantedInShareBasedPaymentArrangementIncludingTransfers_019c0020-9c23-73f1-9c7f-cb5c944b97e1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NumberOfOtherEquityInstrumentsExercisedOrVestedInSharebasedPaymentArrangement_019c0020-9c23-7070-b221-2df53dc96b02" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NumberOfOtherEquityInstrumentsExercisedOrVestedInSharebasedPaymentArrangement"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_019c0020-9c23-7ee8-9077-4762f05657c8" xlink:to="loc_ifrs-full_NumberOfOtherEquityInstrumentsExercisedOrVestedInSharebasedPaymentArrangement_019c0020-9c23-7070-b221-2df53dc96b02" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NumberOfOtherEquityInstrumentsForfeitedInSharebasedPaymentArrangement_019c0020-9c23-796f-85d5-bcdc411188ae" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NumberOfOtherEquityInstrumentsForfeitedInSharebasedPaymentArrangement"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_019c0020-9c23-7ee8-9077-4762f05657c8" xlink:to="loc_ifrs-full_NumberOfOtherEquityInstrumentsForfeitedInSharebasedPaymentArrangement_019c0020-9c23-796f-85d5-bcdc411188ae" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NumberOfOtherEquityInstrumentsOutstandingInSharebasedPaymentArrangement_019c0020-9c23-7fc5-81c2-cb5d1af5a62b" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NumberOfOtherEquityInstrumentsOutstandingInSharebasedPaymentArrangement"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_WeightedAverageExercisePriceOfShareOptionsGrantedInSharebasedPaymentArrangement2019_019c0020-9c23-706e-89c5-30173a8591d3" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_WeightedAverageExercisePriceOfShareOptionsGrantedInSharebasedPaymentArrangement2019"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_019c0020-9c23-7ee8-9077-4762f05657c8" xlink:to="loc_ifrs-full_WeightedAverageExercisePriceOfShareOptionsGrantedInSharebasedPaymentArrangement2019_019c0020-9c23-706e-89c5-30173a8591d3" xlink:type="arc" order="5"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.titanamerica.com/role/FinancialriskmanagementobjectivesandpoliciesMaturityProfileofFinancialLiabilitiesDetails" xlink:type="simple" xlink:href="ttam-20251231.xsd#FinancialriskmanagementobjectivesandpoliciesMaturityProfileofFinancialLiabilitiesDetails"/>
  <link:definitionLink xlink:role="http://www.titanamerica.com/role/FinancialriskmanagementobjectivesandpoliciesMaturityProfileofFinancialLiabilitiesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfFinancialInstrumentsLineItems_019c0020-9c23-7b45-b0f7-8458fb89165f" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfFinancialInstrumentsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfFinancialInstrumentsTable_019c0020-9c23-740c-9457-698c0d430ea6" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfFinancialInstrumentsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfFinancialInstrumentsLineItems_019c0020-9c23-7b45-b0f7-8458fb89165f" xlink:to="loc_ifrs-full_DisclosureOfFinancialInstrumentsTable_019c0020-9c23-740c-9457-698c0d430ea6" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_MaturityAxis_019c0020-9c23-7f59-906c-71f3bcb9c575" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_MaturityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfFinancialInstrumentsTable_019c0020-9c23-740c-9457-698c0d430ea6" xlink:to="loc_ifrs-full_MaturityAxis_019c0020-9c23-7f59-906c-71f3bcb9c575" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_MaturityDomain_019c0020-9c23-7f59-906c-71f3bcb9c575_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_MaturityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_MaturityAxis_019c0020-9c23-7f59-906c-71f3bcb9c575" xlink:to="loc_ifrs-full_MaturityDomain_019c0020-9c23-7f59-906c-71f3bcb9c575_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_MaturityDomain_019c0020-9c23-7239-bce2-01f7278761c9" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_MaturityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_MaturityAxis_019c0020-9c23-7f59-906c-71f3bcb9c575" xlink:to="loc_ifrs-full_MaturityDomain_019c0020-9c23-7239-bce2-01f7278761c9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_NotLaterThanSixMonthsMember_019c0020-9c23-7d16-a822-9a823f17b9bd" xlink:href="ttam-20251231.xsd#ttam_NotLaterThanSixMonthsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_MaturityDomain_019c0020-9c23-7239-bce2-01f7278761c9" xlink:to="loc_ttam_NotLaterThanSixMonthsMember_019c0020-9c23-7d16-a822-9a823f17b9bd" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LaterThanSixMonthsAndNotLaterThanOneYearMember_019c0020-9c23-7ee7-a5d1-2a57d017b58a" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_LaterThanSixMonthsAndNotLaterThanOneYearMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_MaturityDomain_019c0020-9c23-7239-bce2-01f7278761c9" xlink:to="loc_ifrs-full_LaterThanSixMonthsAndNotLaterThanOneYearMember_019c0020-9c23-7ee7-a5d1-2a57d017b58a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LaterThanOneYearAndNotLaterThanFiveYearsMember_019c0020-9c23-70d5-b893-4cfc7371a7b9" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_LaterThanOneYearAndNotLaterThanFiveYearsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_MaturityDomain_019c0020-9c23-7239-bce2-01f7278761c9" xlink:to="loc_ifrs-full_LaterThanOneYearAndNotLaterThanFiveYearsMember_019c0020-9c23-70d5-b893-4cfc7371a7b9" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LaterThanFiveYearsMember_019c0020-9c23-70a7-89c8-cfc124b2b629" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_LaterThanFiveYearsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_MaturityDomain_019c0020-9c23-7239-bce2-01f7278761c9" xlink:to="loc_ifrs-full_LaterThanFiveYearsMember_019c0020-9c23-70a7-89c8-cfc124b2b629" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_BorrowingsRelatedPartiesUndiscountedCashFlows_019c0020-9c23-7224-bc8c-dd46a1115f7e" xlink:href="ttam-20251231.xsd#ttam_BorrowingsRelatedPartiesUndiscountedCashFlows"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfFinancialInstrumentsLineItems_019c0020-9c23-7b45-b0f7-8458fb89165f" xlink:to="loc_ttam_BorrowingsRelatedPartiesUndiscountedCashFlows_019c0020-9c23-7224-bc8c-dd46a1115f7e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_BorrowingsThirdPartiesUndiscountedCashFlows_019c0020-9c23-7a28-aaf4-9e0b2f048566" xlink:href="ttam-20251231.xsd#ttam_BorrowingsThirdPartiesUndiscountedCashFlows"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfFinancialInstrumentsLineItems_019c0020-9c23-7b45-b0f7-8458fb89165f" xlink:to="loc_ttam_BorrowingsThirdPartiesUndiscountedCashFlows_019c0020-9c23-7a28-aaf4-9e0b2f048566" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_GrossLeaseLiabilities_019c0020-9c23-72b1-8975-9f77343ce9fd" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_GrossLeaseLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfFinancialInstrumentsLineItems_019c0020-9c23-7b45-b0f7-8458fb89165f" xlink:to="loc_ifrs-full_GrossLeaseLiabilities_019c0020-9c23-72b1-8975-9f77343ce9fd" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DerivativeFinancialLiabilitiesUndiscountedCashFlows_019c0020-9c23-7c4e-8c53-f1dde589bf91" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DerivativeFinancialLiabilitiesUndiscountedCashFlows"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfFinancialInstrumentsLineItems_019c0020-9c23-7b45-b0f7-8458fb89165f" xlink:to="loc_ifrs-full_DerivativeFinancialLiabilitiesUndiscountedCashFlows_019c0020-9c23-7c4e-8c53-f1dde589bf91" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_OtherNonCurrentLiabilitiesUndiscountedCashFlows_019c0020-9c23-741d-b297-de068e379e97" xlink:href="ttam-20251231.xsd#ttam_OtherNonCurrentLiabilitiesUndiscountedCashFlows"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfFinancialInstrumentsLineItems_019c0020-9c23-7b45-b0f7-8458fb89165f" xlink:to="loc_ttam_OtherNonCurrentLiabilitiesUndiscountedCashFlows_019c0020-9c23-741d-b297-de068e379e97" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TradeAndOtherPayablesUndiscountedCashFlows_019c0020-9c23-7f0c-af05-c431d8752d00" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TradeAndOtherPayablesUndiscountedCashFlows"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfFinancialInstrumentsLineItems_019c0020-9c23-7b45-b0f7-8458fb89165f" xlink:to="loc_ifrs-full_TradeAndOtherPayablesUndiscountedCashFlows_019c0020-9c23-7f0c-af05-c431d8752d00" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_LiabilitiesUndiscountedCashFlows_019c0020-9c23-770f-b2f8-1e66aec12538" xlink:href="ttam-20251231.xsd#ttam_LiabilitiesUndiscountedCashFlows"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfFinancialInstrumentsLineItems_019c0020-9c23-7b45-b0f7-8458fb89165f" xlink:to="loc_ttam_LiabilitiesUndiscountedCashFlows_019c0020-9c23-770f-b2f8-1e66aec12538" xlink:type="arc" order="6"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.titanamerica.com/role/FinancialriskmanagementobjectivesandpoliciesNarrativeDetails" xlink:type="simple" xlink:href="ttam-20251231.xsd#FinancialriskmanagementobjectivesandpoliciesNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.titanamerica.com/role/FinancialriskmanagementobjectivesandpoliciesNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfFinancialInstrumentsLineItems_019c0020-9c23-707a-85aa-ebbf5f8ec74b" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfFinancialInstrumentsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfFinancialInstrumentsTable_019c0020-9c23-7753-a68c-465903487ec3" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfFinancialInstrumentsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfFinancialInstrumentsLineItems_019c0020-9c23-707a-85aa-ebbf5f8ec74b" xlink:to="loc_ifrs-full_DisclosureOfFinancialInstrumentsTable_019c0020-9c23-7753-a68c-465903487ec3" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_HedgingInstrumentsAxis_019c0020-9c23-721c-81d6-551a416db3c6" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_HedgingInstrumentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfFinancialInstrumentsTable_019c0020-9c23-7753-a68c-465903487ec3" xlink:to="loc_ifrs-full_HedgingInstrumentsAxis_019c0020-9c23-721c-81d6-551a416db3c6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_HedgingInstrumentsDomain_019c0020-9c23-721c-81d6-551a416db3c6_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_HedgingInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_HedgingInstrumentsAxis_019c0020-9c23-721c-81d6-551a416db3c6" xlink:to="loc_ifrs-full_HedgingInstrumentsDomain_019c0020-9c23-721c-81d6-551a416db3c6_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_HedgingInstrumentsDomain_019c0020-9c23-7f20-83d3-26bae6442d59" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_HedgingInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_HedgingInstrumentsAxis_019c0020-9c23-721c-81d6-551a416db3c6" xlink:to="loc_ifrs-full_HedgingInstrumentsDomain_019c0020-9c23-7f20-83d3-26bae6442d59" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_CrossCurrencyInterestRateSwapMaturingJune2029Member_019c0020-9c23-7015-866b-72e14a98286b" xlink:href="ttam-20251231.xsd#ttam_CrossCurrencyInterestRateSwapMaturingJune2029Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_HedgingInstrumentsDomain_019c0020-9c23-7f20-83d3-26bae6442d59" xlink:to="loc_ttam_CrossCurrencyInterestRateSwapMaturingJune2029Member_019c0020-9c23-7015-866b-72e14a98286b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_CrossCurrencyInterestRateSwapMaturingJuly2027Member_019c0020-9c23-780b-918c-4a481c7bffb3" xlink:href="ttam-20251231.xsd#ttam_CrossCurrencyInterestRateSwapMaturingJuly2027Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_HedgingInstrumentsDomain_019c0020-9c23-7f20-83d3-26bae6442d59" xlink:to="loc_ttam_CrossCurrencyInterestRateSwapMaturingJuly2027Member_019c0020-9c23-780b-918c-4a481c7bffb3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_ForeignExchangeForwardsFixedRateDebtMember_019c0020-9c23-79d7-8bad-42b49055c5c7" xlink:href="ttam-20251231.xsd#ttam_ForeignExchangeForwardsFixedRateDebtMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_HedgingInstrumentsDomain_019c0020-9c23-7f20-83d3-26bae6442d59" xlink:to="loc_ttam_ForeignExchangeForwardsFixedRateDebtMember_019c0020-9c23-79d7-8bad-42b49055c5c7" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_ForeignExchangeForwardsVariableRateRCFDebtMember_019c0020-9c23-7741-88e2-ae9b45ed2739" xlink:href="ttam-20251231.xsd#ttam_ForeignExchangeForwardsVariableRateRCFDebtMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_HedgingInstrumentsDomain_019c0020-9c23-7f20-83d3-26bae6442d59" xlink:to="loc_ttam_ForeignExchangeForwardsVariableRateRCFDebtMember_019c0020-9c23-7741-88e2-ae9b45ed2739" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_InterestRateSwapContractMember_019c0020-9c23-78fb-9898-63f086a17c71" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_InterestRateSwapContractMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_HedgingInstrumentsDomain_019c0020-9c23-7f20-83d3-26bae6442d59" xlink:to="loc_ifrs-full_InterestRateSwapContractMember_019c0020-9c23-78fb-9898-63f086a17c71" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_NaturalGasCashFlowHedgeMember_019c0020-9c23-74c0-8ce4-aa4bbc3be5e9" xlink:href="ttam-20251231.xsd#ttam_NaturalGasCashFlowHedgeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_HedgingInstrumentsDomain_019c0020-9c23-7f20-83d3-26bae6442d59" xlink:to="loc_ttam_NaturalGasCashFlowHedgeMember_019c0020-9c23-74c0-8ce4-aa4bbc3be5e9" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TypesOfRisksAxis_019c0020-9c23-7143-a5f5-c0a2bbac6da8" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TypesOfRisksAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfFinancialInstrumentsTable_019c0020-9c23-7753-a68c-465903487ec3" xlink:to="loc_ifrs-full_TypesOfRisksAxis_019c0020-9c23-7143-a5f5-c0a2bbac6da8" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TypesOfRisksDomain_019c0020-9c23-7143-a5f5-c0a2bbac6da8_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TypesOfRisksDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_TypesOfRisksAxis_019c0020-9c23-7143-a5f5-c0a2bbac6da8" xlink:to="loc_ifrs-full_TypesOfRisksDomain_019c0020-9c23-7143-a5f5-c0a2bbac6da8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TypesOfRisksDomain_019c0020-9c23-7d82-b6ec-3d1358d00e0c" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TypesOfRisksDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_TypesOfRisksAxis_019c0020-9c23-7143-a5f5-c0a2bbac6da8" xlink:to="loc_ifrs-full_TypesOfRisksDomain_019c0020-9c23-7d82-b6ec-3d1358d00e0c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_InterestRateRiskMember_019c0020-9c23-7200-86a2-3e5dc859316d" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_InterestRateRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_TypesOfRisksDomain_019c0020-9c23-7d82-b6ec-3d1358d00e0c" xlink:to="loc_ifrs-full_InterestRateRiskMember_019c0020-9c23-7200-86a2-3e5dc859316d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_ForeignCurrencyExchangeRateRiskMember_019c0020-9c23-70f2-8c09-e1613a77553b" xlink:href="ttam-20251231.xsd#ttam_ForeignCurrencyExchangeRateRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_TypesOfRisksDomain_019c0020-9c23-7d82-b6ec-3d1358d00e0c" xlink:to="loc_ttam_ForeignCurrencyExchangeRateRiskMember_019c0020-9c23-70f2-8c09-e1613a77553b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TypesOfHedgesAxis_019c0020-9c23-743e-a3ce-0370e93d4f89" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TypesOfHedgesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfFinancialInstrumentsTable_019c0020-9c23-7753-a68c-465903487ec3" xlink:to="loc_ifrs-full_TypesOfHedgesAxis_019c0020-9c23-743e-a3ce-0370e93d4f89" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TypesOfHedgesDomain_019c0020-9c23-743e-a3ce-0370e93d4f89_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TypesOfHedgesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_TypesOfHedgesAxis_019c0020-9c23-743e-a3ce-0370e93d4f89" xlink:to="loc_ifrs-full_TypesOfHedgesDomain_019c0020-9c23-743e-a3ce-0370e93d4f89_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TypesOfHedgesDomain_019c0020-9c23-76b7-a2ba-30d8ef160565" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TypesOfHedgesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_TypesOfHedgesAxis_019c0020-9c23-743e-a3ce-0370e93d4f89" xlink:to="loc_ifrs-full_TypesOfHedgesDomain_019c0020-9c23-76b7-a2ba-30d8ef160565" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_HedgesOfNetInvestmentInForeignOperationsMember_019c0020-9c23-7385-90cd-fe502488f729" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_HedgesOfNetInvestmentInForeignOperationsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_TypesOfHedgesDomain_019c0020-9c23-76b7-a2ba-30d8ef160565" xlink:to="loc_ifrs-full_HedgesOfNetInvestmentInForeignOperationsMember_019c0020-9c23-7385-90cd-fe502488f729" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_EconomicHedgesMember_019c0020-9c23-7f90-8944-82d1fb3aca5c" xlink:href="ttam-20251231.xsd#ttam_EconomicHedgesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_TypesOfHedgesDomain_019c0020-9c23-76b7-a2ba-30d8ef160565" xlink:to="loc_ttam_EconomicHedgesMember_019c0020-9c23-7f90-8944-82d1fb3aca5c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CashFlowHedgesMember_019c0020-9c23-74e2-87a0-30ce2e57a73e" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CashFlowHedgesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_TypesOfHedgesDomain_019c0020-9c23-76b7-a2ba-30d8ef160565" xlink:to="loc_ifrs-full_CashFlowHedgesMember_019c0020-9c23-74e2-87a0-30ce2e57a73e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_ExchangeRatePeriodAxis_019c0020-9c23-741e-a21e-0a42a1aae35a" xlink:href="ttam-20251231.xsd#ttam_ExchangeRatePeriodAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfFinancialInstrumentsTable_019c0020-9c23-7753-a68c-465903487ec3" xlink:to="loc_ttam_ExchangeRatePeriodAxis_019c0020-9c23-741e-a21e-0a42a1aae35a" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_ExchangeRatePeriodDomain_019c0020-9c23-741e-a21e-0a42a1aae35a_default" xlink:href="ttam-20251231.xsd#ttam_ExchangeRatePeriodDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ttam_ExchangeRatePeriodAxis_019c0020-9c23-741e-a21e-0a42a1aae35a" xlink:to="loc_ttam_ExchangeRatePeriodDomain_019c0020-9c23-741e-a21e-0a42a1aae35a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_ExchangeRatePeriodDomain_019c0020-9c23-7c48-93ee-7e9539a6bbef" xlink:href="ttam-20251231.xsd#ttam_ExchangeRatePeriodDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ttam_ExchangeRatePeriodAxis_019c0020-9c23-741e-a21e-0a42a1aae35a" xlink:to="loc_ttam_ExchangeRatePeriodDomain_019c0020-9c23-7c48-93ee-7e9539a6bbef" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_ExchangeRatePeriodOneMember_019c0020-9c23-7d91-ac0e-56266dc66247" xlink:href="ttam-20251231.xsd#ttam_ExchangeRatePeriodOneMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ttam_ExchangeRatePeriodDomain_019c0020-9c23-7c48-93ee-7e9539a6bbef" xlink:to="loc_ttam_ExchangeRatePeriodOneMember_019c0020-9c23-7d91-ac0e-56266dc66247" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_ExchangeRatePeriodTwoMember_019c0020-9c23-789c-a448-03120552fad7" xlink:href="ttam-20251231.xsd#ttam_ExchangeRatePeriodTwoMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ttam_ExchangeRatePeriodDomain_019c0020-9c23-7c48-93ee-7e9539a6bbef" xlink:to="loc_ttam_ExchangeRatePeriodTwoMember_019c0020-9c23-789c-a448-03120552fad7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_ExchangeRatePeriodThreeMember_019c0020-9c23-7d46-866d-7a6a58cb8b25" xlink:href="ttam-20251231.xsd#ttam_ExchangeRatePeriodThreeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ttam_ExchangeRatePeriodDomain_019c0020-9c23-7c48-93ee-7e9539a6bbef" xlink:to="loc_ttam_ExchangeRatePeriodThreeMember_019c0020-9c23-7d46-866d-7a6a58cb8b25" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_ExchangeRatePeriodFourMember_019c0020-9c23-7a02-88e9-db96f57b8590" xlink:href="ttam-20251231.xsd#ttam_ExchangeRatePeriodFourMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ttam_ExchangeRatePeriodDomain_019c0020-9c23-7c48-93ee-7e9539a6bbef" xlink:to="loc_ttam_ExchangeRatePeriodFourMember_019c0020-9c23-7a02-88e9-db96f57b8590" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_FixedRateInterestTermsAxis_019c0020-9c23-7a59-9bab-788f361c36b8" xlink:href="ttam-20251231.xsd#ttam_FixedRateInterestTermsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfFinancialInstrumentsTable_019c0020-9c23-7753-a68c-465903487ec3" xlink:to="loc_ttam_FixedRateInterestTermsAxis_019c0020-9c23-7a59-9bab-788f361c36b8" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_FixedRateInterestTermsDomain_019c0020-9c23-7a59-9bab-788f361c36b8_default" xlink:href="ttam-20251231.xsd#ttam_FixedRateInterestTermsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ttam_FixedRateInterestTermsAxis_019c0020-9c23-7a59-9bab-788f361c36b8" xlink:to="loc_ttam_FixedRateInterestTermsDomain_019c0020-9c23-7a59-9bab-788f361c36b8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_FixedRateInterestTermsDomain_019c0020-9c23-7c47-9f39-e17d65a7a043" xlink:href="ttam-20251231.xsd#ttam_FixedRateInterestTermsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ttam_FixedRateInterestTermsAxis_019c0020-9c23-7a59-9bab-788f361c36b8" xlink:to="loc_ttam_FixedRateInterestTermsDomain_019c0020-9c23-7c47-9f39-e17d65a7a043" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_FixedRateInterest2.653PercentMember_019c0020-9c23-7ba9-8a29-f9c40f2661ec" xlink:href="ttam-20251231.xsd#ttam_FixedRateInterest2.653PercentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ttam_FixedRateInterestTermsDomain_019c0020-9c23-7c47-9f39-e17d65a7a043" xlink:to="loc_ttam_FixedRateInterest2.653PercentMember_019c0020-9c23-7ba9-8a29-f9c40f2661ec" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_FixedRateInterest2.655PercentMember_019c0020-9c23-790b-9c2a-72b20c752ed1" xlink:href="ttam-20251231.xsd#ttam_FixedRateInterest2.655PercentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ttam_FixedRateInterestTermsDomain_019c0020-9c23-7c47-9f39-e17d65a7a043" xlink:to="loc_ttam_FixedRateInterest2.655PercentMember_019c0020-9c23-790b-9c2a-72b20c752ed1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_FixedRateInterest3.976PercentMember_019c0020-9c23-72b2-819d-ccb6d49378cf" xlink:href="ttam-20251231.xsd#ttam_FixedRateInterest3.976PercentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ttam_FixedRateInterestTermsDomain_019c0020-9c23-7c47-9f39-e17d65a7a043" xlink:to="loc_ttam_FixedRateInterest3.976PercentMember_019c0020-9c23-72b2-819d-ccb6d49378cf" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_FixedRateInterest4.166PercentMember_019c0020-9c23-79a1-b110-2acf7f1e14f3" xlink:href="ttam-20251231.xsd#ttam_FixedRateInterest4.166PercentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ttam_FixedRateInterestTermsDomain_019c0020-9c23-7c47-9f39-e17d65a7a043" xlink:to="loc_ttam_FixedRateInterest4.166PercentMember_019c0020-9c23-79a1-b110-2acf7f1e14f3" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RangeAxis_019c0020-9c23-76db-8bcf-13a2e4f75b7e" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfFinancialInstrumentsTable_019c0020-9c23-7753-a68c-465903487ec3" xlink:to="loc_ifrs-full_RangeAxis_019c0020-9c23-76db-8bcf-13a2e4f75b7e" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RangeDomain_019c0020-9c23-76db-8bcf-13a2e4f75b7e_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_RangeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_RangeAxis_019c0020-9c23-76db-8bcf-13a2e4f75b7e" xlink:to="loc_ifrs-full_RangeDomain_019c0020-9c23-76db-8bcf-13a2e4f75b7e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RangeDomain_019c0020-9c23-71cb-a032-b6447af249e5" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_RangeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_RangeAxis_019c0020-9c23-76db-8bcf-13a2e4f75b7e" xlink:to="loc_ifrs-full_RangeDomain_019c0020-9c23-71cb-a032-b6447af249e5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_019c0020-9c23-774a-a3c8-27d03c6ce63f" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_RangeDomain_019c0020-9c23-71cb-a032-b6447af249e5" xlink:to="loc_srt_MaximumMember_019c0020-9c23-774a-a3c8-27d03c6ce63f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_019c0020-9c23-7673-a824-e2ae09809c6e" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_RangeDomain_019c0020-9c23-71cb-a032-b6447af249e5" xlink:to="loc_srt_MinimumMember_019c0020-9c23-7673-a824-e2ae09809c6e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NonadjustingEventsAfterReportingPeriodAxis_019d0c17-887f-7b23-9a54-e5c399e71648" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NonadjustingEventsAfterReportingPeriodAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfFinancialInstrumentsTable_019c0020-9c23-7753-a68c-465903487ec3" xlink:to="loc_ifrs-full_NonadjustingEventsAfterReportingPeriodAxis_019d0c17-887f-7b23-9a54-e5c399e71648" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NonadjustingEventsAfterReportingPeriodDomain_019d0c17-887f-7b23-9a54-e5c399e71648_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NonadjustingEventsAfterReportingPeriodDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_NonadjustingEventsAfterReportingPeriodAxis_019d0c17-887f-7b23-9a54-e5c399e71648" xlink:to="loc_ifrs-full_NonadjustingEventsAfterReportingPeriodDomain_019d0c17-887f-7b23-9a54-e5c399e71648_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NonadjustingEventsAfterReportingPeriodDomain_019d0c17-887f-7fd5-aa9e-3f7b1d93499d" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NonadjustingEventsAfterReportingPeriodDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_NonadjustingEventsAfterReportingPeriodAxis_019d0c17-887f-7b23-9a54-e5c399e71648" xlink:to="loc_ifrs-full_NonadjustingEventsAfterReportingPeriodDomain_019d0c17-887f-7fd5-aa9e-3f7b1d93499d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_RenewalOfDerivativeMember_019d0c18-870d-7e68-adb7-0b999ca58b3b" xlink:href="ttam-20251231.xsd#ttam_RenewalOfDerivativeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_NonadjustingEventsAfterReportingPeriodDomain_019d0c17-887f-7fd5-aa9e-3f7b1d93499d" xlink:to="loc_ttam_RenewalOfDerivativeMember_019d0c18-870d-7e68-adb7-0b999ca58b3b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_HedgingInstrumentAssets_019c0020-9c23-7bfd-88f4-1f38b7a401aa" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_HedgingInstrumentAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfFinancialInstrumentsLineItems_019c0020-9c23-707a-85aa-ebbf5f8ec74b" xlink:to="loc_ifrs-full_HedgingInstrumentAssets_019c0020-9c23-7bfd-88f4-1f38b7a401aa" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_HedgingInstrumentLengthOfAgreement_019c0020-9c23-7dbd-9ec2-4fffd4cb7479" xlink:href="ttam-20251231.xsd#ttam_HedgingInstrumentLengthOfAgreement"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfFinancialInstrumentsLineItems_019c0020-9c23-707a-85aa-ebbf5f8ec74b" xlink:to="loc_ttam_HedgingInstrumentLengthOfAgreement_019c0020-9c23-7dbd-9ec2-4fffd4cb7479" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_HedgingInstrumentExchangeRateRepaymentRatio_019c0020-9c23-7d3b-81eb-160dd3055f80" xlink:href="ttam-20251231.xsd#ttam_HedgingInstrumentExchangeRateRepaymentRatio"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfFinancialInstrumentsLineItems_019c0020-9c23-707a-85aa-ebbf5f8ec74b" xlink:to="loc_ttam_HedgingInstrumentExchangeRateRepaymentRatio_019c0020-9c23-7d3b-81eb-160dd3055f80" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NotionalAmount_019c0020-9c23-7047-989b-1529fb34b3c0" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NotionalAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfFinancialInstrumentsLineItems_019c0020-9c23-707a-85aa-ebbf5f8ec74b" xlink:to="loc_ifrs-full_NotionalAmount_019c0020-9c23-7047-989b-1529fb34b3c0" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_NotionalValueExchangeRate_019c0020-9c23-7e1b-bde7-528693ac2243" xlink:href="ttam-20251231.xsd#ttam_NotionalValueExchangeRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfFinancialInstrumentsLineItems_019c0020-9c23-707a-85aa-ebbf5f8ec74b" xlink:to="loc_ttam_NotionalValueExchangeRate_019c0020-9c23-7e1b-bde7-528693ac2243" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_NotionalValueAverageExchangeRate_019c0020-9c23-7921-9051-26e4af171ff3" xlink:href="ttam-20251231.xsd#ttam_NotionalValueAverageExchangeRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfFinancialInstrumentsLineItems_019c0020-9c23-707a-85aa-ebbf5f8ec74b" xlink:to="loc_ttam_NotionalValueAverageExchangeRate_019c0020-9c23-7921-9051-26e4af171ff3" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_HedgingInstrumentNumberOfAgreements_019c0020-9c23-7d94-b2a3-65f6179ad763" xlink:href="ttam-20251231.xsd#ttam_HedgingInstrumentNumberOfAgreements"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfFinancialInstrumentsLineItems_019c0020-9c23-707a-85aa-ebbf5f8ec74b" xlink:to="loc_ttam_HedgingInstrumentNumberOfAgreements_019c0020-9c23-7d94-b2a3-65f6179ad763" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_HedgingInstrumentFixedInterestRate_019c0020-9c23-73dd-a513-d87602764580" xlink:href="ttam-20251231.xsd#ttam_HedgingInstrumentFixedInterestRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfFinancialInstrumentsLineItems_019c0020-9c23-707a-85aa-ebbf5f8ec74b" xlink:to="loc_ttam_HedgingInstrumentFixedInterestRate_019c0020-9c23-73dd-a513-d87602764580" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NominalAmountOfHedgingInstrument_019c0020-9c23-7a72-aef6-948e5e4ed0d4" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NominalAmountOfHedgingInstrument"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfFinancialInstrumentsLineItems_019c0020-9c23-707a-85aa-ebbf5f8ec74b" xlink:to="loc_ifrs-full_NominalAmountOfHedgingInstrument_019c0020-9c23-7a72-aef6-948e5e4ed0d4" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_NominalAmountOfHedgingInstrumentOutstanding_019c0020-9c23-7177-9191-838f3d0fe4bf" xlink:href="ttam-20251231.xsd#ttam_NominalAmountOfHedgingInstrumentOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfFinancialInstrumentsLineItems_019c0020-9c23-707a-85aa-ebbf5f8ec74b" xlink:to="loc_ttam_NominalAmountOfHedgingInstrumentOutstanding_019c0020-9c23-7177-9191-838f3d0fe4bf" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_DerivativeFinancialInstrumentsCreditSupportPaymentsPaymentThreshold_019c0020-9c23-7924-9764-2cc4b1f5f084" xlink:href="ttam-20251231.xsd#ttam_DerivativeFinancialInstrumentsCreditSupportPaymentsPaymentThreshold"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfFinancialInstrumentsLineItems_019c0020-9c23-707a-85aa-ebbf5f8ec74b" xlink:to="loc_ttam_DerivativeFinancialInstrumentsCreditSupportPaymentsPaymentThreshold_019c0020-9c23-7924-9764-2cc4b1f5f084" xlink:type="arc" order="10"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.titanamerica.com/role/FinancialriskmanagementobjectivesandpoliciesSensitivityAnalysistoForeignExchangeRateDifferencesDetails" xlink:type="simple" xlink:href="ttam-20251231.xsd#FinancialriskmanagementobjectivesandpoliciesSensitivityAnalysistoForeignExchangeRateDifferencesDetails"/>
  <link:definitionLink xlink:role="http://www.titanamerica.com/role/FinancialriskmanagementobjectivesandpoliciesSensitivityAnalysistoForeignExchangeRateDifferencesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfFinancialInstrumentsLineItems_019c0020-9c23-7527-a1a5-cf99fbdd666b" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfFinancialInstrumentsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfFinancialInstrumentsTable_019c0020-9c23-7c5c-8fc8-7afbb1586d4c" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfFinancialInstrumentsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfFinancialInstrumentsLineItems_019c0020-9c23-7527-a1a5-cf99fbdd666b" xlink:to="loc_ifrs-full_DisclosureOfFinancialInstrumentsTable_019c0020-9c23-7c5c-8fc8-7afbb1586d4c" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TypesOfRisksAxis_019c0020-9c23-7319-915c-c032ee4d6adf" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TypesOfRisksAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfFinancialInstrumentsTable_019c0020-9c23-7c5c-8fc8-7afbb1586d4c" xlink:to="loc_ifrs-full_TypesOfRisksAxis_019c0020-9c23-7319-915c-c032ee4d6adf" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TypesOfRisksDomain_019c0020-9c23-7319-915c-c032ee4d6adf_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TypesOfRisksDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_TypesOfRisksAxis_019c0020-9c23-7319-915c-c032ee4d6adf" xlink:to="loc_ifrs-full_TypesOfRisksDomain_019c0020-9c23-7319-915c-c032ee4d6adf_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TypesOfRisksDomain_019c0020-9c23-7695-877b-d72a7331a482" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TypesOfRisksDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_TypesOfRisksAxis_019c0020-9c23-7319-915c-c032ee4d6adf" xlink:to="loc_ifrs-full_TypesOfRisksDomain_019c0020-9c23-7695-877b-d72a7331a482" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_ForeignExchangeRateDifferencesMember_019c0020-9c23-7166-87c2-8605815a8fc3" xlink:href="ttam-20251231.xsd#ttam_ForeignExchangeRateDifferencesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_TypesOfRisksDomain_019c0020-9c23-7695-877b-d72a7331a482" xlink:to="loc_ttam_ForeignExchangeRateDifferencesMember_019c0020-9c23-7166-87c2-8605815a8fc3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleChangeInRiskVariableDecreaseInRatePercent_019c0020-9c23-7fae-a770-49b06bb81334" xlink:href="ttam-20251231.xsd#ttam_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleChangeInRiskVariableDecreaseInRatePercent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfFinancialInstrumentsLineItems_019c0020-9c23-7527-a1a5-cf99fbdd666b" xlink:to="loc_ttam_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleChangeInRiskVariableDecreaseInRatePercent_019c0020-9c23-7fae-a770-49b06bb81334" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleChangeInRiskVariableDecreaseInRateImpactOnPreTaxEarnings_019c0020-9c23-7d2a-bc50-3d9cba7a33bf" xlink:href="ttam-20251231.xsd#ttam_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleChangeInRiskVariableDecreaseInRateImpactOnPreTaxEarnings"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfFinancialInstrumentsLineItems_019c0020-9c23-7527-a1a5-cf99fbdd666b" xlink:to="loc_ttam_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleChangeInRiskVariableDecreaseInRateImpactOnPreTaxEarnings_019c0020-9c23-7d2a-bc50-3d9cba7a33bf" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleChangeInRiskVariableIncreaseInRatePercent_019c0020-9c23-7bfb-938a-a1c9519609a1" xlink:href="ttam-20251231.xsd#ttam_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleChangeInRiskVariableIncreaseInRatePercent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfFinancialInstrumentsLineItems_019c0020-9c23-7527-a1a5-cf99fbdd666b" xlink:to="loc_ttam_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleChangeInRiskVariableIncreaseInRatePercent_019c0020-9c23-7bfb-938a-a1c9519609a1" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleChangeInRiskVariableIncreaseInRateImpactOnPreTaxEarnings_019c0020-9c23-7974-81a2-e5e60ee01016" xlink:href="ttam-20251231.xsd#ttam_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleChangeInRiskVariableIncreaseInRateImpactOnPreTaxEarnings"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfFinancialInstrumentsLineItems_019c0020-9c23-7527-a1a5-cf99fbdd666b" xlink:to="loc_ttam_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleChangeInRiskVariableIncreaseInRateImpactOnPreTaxEarnings_019c0020-9c23-7974-81a2-e5e60ee01016" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.titanamerica.com/role/FinancialriskmanagementobjectivesandpoliciesSensitivityAnalysistoInterestRateRiskDetails" xlink:type="simple" xlink:href="ttam-20251231.xsd#FinancialriskmanagementobjectivesandpoliciesSensitivityAnalysistoInterestRateRiskDetails"/>
  <link:definitionLink xlink:role="http://www.titanamerica.com/role/FinancialriskmanagementobjectivesandpoliciesSensitivityAnalysistoInterestRateRiskDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfFinancialInstrumentsLineItems_019c0020-9c23-7e9b-b285-252953ad8044" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfFinancialInstrumentsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfFinancialInstrumentsTable_019c0020-9c23-735b-9556-ed4897132271" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfFinancialInstrumentsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfFinancialInstrumentsLineItems_019c0020-9c23-7e9b-b285-252953ad8044" xlink:to="loc_ifrs-full_DisclosureOfFinancialInstrumentsTable_019c0020-9c23-735b-9556-ed4897132271" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TypesOfRisksAxis_019c0020-9c23-7c4b-809c-43d99e65afa8" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TypesOfRisksAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfFinancialInstrumentsTable_019c0020-9c23-735b-9556-ed4897132271" xlink:to="loc_ifrs-full_TypesOfRisksAxis_019c0020-9c23-7c4b-809c-43d99e65afa8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TypesOfRisksDomain_019c0020-9c23-7c4b-809c-43d99e65afa8_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TypesOfRisksDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_TypesOfRisksAxis_019c0020-9c23-7c4b-809c-43d99e65afa8" xlink:to="loc_ifrs-full_TypesOfRisksDomain_019c0020-9c23-7c4b-809c-43d99e65afa8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TypesOfRisksDomain_019c0020-9c23-7b66-b73a-69c72d4aaaf2" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TypesOfRisksDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_TypesOfRisksAxis_019c0020-9c23-7c4b-809c-43d99e65afa8" xlink:to="loc_ifrs-full_TypesOfRisksDomain_019c0020-9c23-7b66-b73a-69c72d4aaaf2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_InterestRateRiskMember_019c0020-9c23-762e-90ba-818fd9744313" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_InterestRateRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_TypesOfRisksDomain_019c0020-9c23-7b66-b73a-69c72d4aaaf2" xlink:to="loc_ifrs-full_InterestRateRiskMember_019c0020-9c23-762e-90ba-818fd9744313" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleChangeInRiskVariableDecreaseInRatePercent_019c0020-9c23-7dc5-8687-677bead62401" xlink:href="ttam-20251231.xsd#ttam_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleChangeInRiskVariableDecreaseInRatePercent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfFinancialInstrumentsLineItems_019c0020-9c23-7e9b-b285-252953ad8044" xlink:to="loc_ttam_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleChangeInRiskVariableDecreaseInRatePercent_019c0020-9c23-7dc5-8687-677bead62401" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleChangeInRiskVariableDecreaseInRateImpactOnPreTaxEarnings_019c0020-9c23-7b7b-b066-af26414e2fcb" xlink:href="ttam-20251231.xsd#ttam_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleChangeInRiskVariableDecreaseInRateImpactOnPreTaxEarnings"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfFinancialInstrumentsLineItems_019c0020-9c23-7e9b-b285-252953ad8044" xlink:to="loc_ttam_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleChangeInRiskVariableDecreaseInRateImpactOnPreTaxEarnings_019c0020-9c23-7b7b-b066-af26414e2fcb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleChangeInRiskVariableIncreaseInRatePercent_019c0020-9c23-7381-af37-34936a803556" xlink:href="ttam-20251231.xsd#ttam_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleChangeInRiskVariableIncreaseInRatePercent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfFinancialInstrumentsLineItems_019c0020-9c23-7e9b-b285-252953ad8044" xlink:to="loc_ttam_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleChangeInRiskVariableIncreaseInRatePercent_019c0020-9c23-7381-af37-34936a803556" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleChangeInRiskVariableIncreaseInRateImpactOnPreTaxEarnings_019c0020-9c23-7a95-be18-015f9c58ff65" xlink:href="ttam-20251231.xsd#ttam_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleChangeInRiskVariableIncreaseInRateImpactOnPreTaxEarnings"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfFinancialInstrumentsLineItems_019c0020-9c23-7e9b-b285-252953ad8044" xlink:to="loc_ttam_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleChangeInRiskVariableIncreaseInRateImpactOnPreTaxEarnings_019c0020-9c23-7a95-be18-015f9c58ff65" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.titanamerica.com/role/FinancialriskmanagementobjectivesandpoliciesSensitivityAnalysistoCashFlowHedgeDetails" xlink:type="simple" xlink:href="ttam-20251231.xsd#FinancialriskmanagementobjectivesandpoliciesSensitivityAnalysistoCashFlowHedgeDetails"/>
  <link:definitionLink xlink:role="http://www.titanamerica.com/role/FinancialriskmanagementobjectivesandpoliciesSensitivityAnalysistoCashFlowHedgeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfFinancialInstrumentsLineItems_019c0020-9c23-7723-9746-29b34595ddad" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfFinancialInstrumentsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfFinancialInstrumentsTable_019c0020-9c23-76a8-af8d-98f680c4d7ef" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfFinancialInstrumentsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfFinancialInstrumentsLineItems_019c0020-9c23-7723-9746-29b34595ddad" xlink:to="loc_ifrs-full_DisclosureOfFinancialInstrumentsTable_019c0020-9c23-76a8-af8d-98f680c4d7ef" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TypesOfRisksAxis_019c0020-9c23-794e-a36e-0e75ae0c3077" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TypesOfRisksAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfFinancialInstrumentsTable_019c0020-9c23-76a8-af8d-98f680c4d7ef" xlink:to="loc_ifrs-full_TypesOfRisksAxis_019c0020-9c23-794e-a36e-0e75ae0c3077" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TypesOfRisksDomain_019c0020-9c23-794e-a36e-0e75ae0c3077_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TypesOfRisksDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_TypesOfRisksAxis_019c0020-9c23-794e-a36e-0e75ae0c3077" xlink:to="loc_ifrs-full_TypesOfRisksDomain_019c0020-9c23-794e-a36e-0e75ae0c3077_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TypesOfRisksDomain_019c0020-9c23-777e-ae44-9a8bc496569b" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TypesOfRisksDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_TypesOfRisksAxis_019c0020-9c23-794e-a36e-0e75ae0c3077" xlink:to="loc_ifrs-full_TypesOfRisksDomain_019c0020-9c23-777e-ae44-9a8bc496569b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_CashFlowHedgeRiskMember_019c0020-9c23-7510-93a1-8134ff51cf41" xlink:href="ttam-20251231.xsd#ttam_CashFlowHedgeRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_TypesOfRisksDomain_019c0020-9c23-777e-ae44-9a8bc496569b" xlink:to="loc_ttam_CashFlowHedgeRiskMember_019c0020-9c23-7510-93a1-8134ff51cf41" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleChangeInRiskVariableDecreaseInContractPricePercent_019c0020-9c23-713b-9e05-e9ce3f1e6369" xlink:href="ttam-20251231.xsd#ttam_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleChangeInRiskVariableDecreaseInContractPricePercent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfFinancialInstrumentsLineItems_019c0020-9c23-7723-9746-29b34595ddad" xlink:to="loc_ttam_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleChangeInRiskVariableDecreaseInContractPricePercent_019c0020-9c23-713b-9e05-e9ce3f1e6369" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleChangeInRiskVariableDecreaseInRateImpactOnOtherComprehensiveIncome_019c0020-9c23-783d-abd3-2ebe72d904c6" xlink:href="ttam-20251231.xsd#ttam_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleChangeInRiskVariableDecreaseInRateImpactOnOtherComprehensiveIncome"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfFinancialInstrumentsLineItems_019c0020-9c23-7723-9746-29b34595ddad" xlink:to="loc_ttam_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleChangeInRiskVariableDecreaseInRateImpactOnOtherComprehensiveIncome_019c0020-9c23-783d-abd3-2ebe72d904c6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleChangeInRiskVariableIncreaseInContractPricePercent_019c0020-9c23-7789-9817-da7f7c050d38" xlink:href="ttam-20251231.xsd#ttam_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleChangeInRiskVariableIncreaseInContractPricePercent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfFinancialInstrumentsLineItems_019c0020-9c23-7723-9746-29b34595ddad" xlink:to="loc_ttam_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleChangeInRiskVariableIncreaseInContractPricePercent_019c0020-9c23-7789-9817-da7f7c050d38" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleChangeInRiskVariableIncreaseInRateImpactOnOtherComprehensiveIncome_019c0020-9c23-7bda-bd95-4be4ecd20aa6" xlink:href="ttam-20251231.xsd#ttam_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleChangeInRiskVariableIncreaseInRateImpactOnOtherComprehensiveIncome"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfFinancialInstrumentsLineItems_019c0020-9c23-7723-9746-29b34595ddad" xlink:to="loc_ttam_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleChangeInRiskVariableIncreaseInRateImpactOnOtherComprehensiveIncome_019c0020-9c23-7bda-bd95-4be4ecd20aa6" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.titanamerica.com/role/FinancialriskmanagementobjectivesandpoliciesFinancialAssetsDetails" xlink:type="simple" xlink:href="ttam-20251231.xsd#FinancialriskmanagementobjectivesandpoliciesFinancialAssetsDetails"/>
  <link:definitionLink xlink:role="http://www.titanamerica.com/role/FinancialriskmanagementobjectivesandpoliciesFinancialAssetsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfFinancialInstrumentsLineItems_019c0020-9c24-7ae4-b729-48fb1773b5dd" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfFinancialInstrumentsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfFinancialInstrumentsTable_019c0020-9c23-7a76-b9e5-ef1c423a1d5a" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfFinancialInstrumentsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfFinancialInstrumentsLineItems_019c0020-9c24-7ae4-b729-48fb1773b5dd" xlink:to="loc_ifrs-full_DisclosureOfFinancialInstrumentsTable_019c0020-9c23-7a76-b9e5-ef1c423a1d5a" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CategoriesOfFinancialAssetsAxis_019c0020-9c23-73ae-a9c1-3b618eda8f4a" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CategoriesOfFinancialAssetsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfFinancialInstrumentsTable_019c0020-9c23-7a76-b9e5-ef1c423a1d5a" xlink:to="loc_ifrs-full_CategoriesOfFinancialAssetsAxis_019c0020-9c23-73ae-a9c1-3b618eda8f4a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CategoriesOfFinancialAssetsDomain_019c0020-9c23-73ae-a9c1-3b618eda8f4a_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CategoriesOfFinancialAssetsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_CategoriesOfFinancialAssetsAxis_019c0020-9c23-73ae-a9c1-3b618eda8f4a" xlink:to="loc_ifrs-full_CategoriesOfFinancialAssetsDomain_019c0020-9c23-73ae-a9c1-3b618eda8f4a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CategoriesOfFinancialAssetsDomain_019c0020-9c23-7e30-b9fd-6421d7751337" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CategoriesOfFinancialAssetsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_CategoriesOfFinancialAssetsAxis_019c0020-9c23-73ae-a9c1-3b618eda8f4a" xlink:to="loc_ifrs-full_CategoriesOfFinancialAssetsDomain_019c0020-9c23-7e30-b9fd-6421d7751337" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_FinancialAssetsAtAmortisedCostCategoryMember_019c0020-9c23-7a32-bbcc-1eebb42eb109" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_FinancialAssetsAtAmortisedCostCategoryMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_CategoriesOfFinancialAssetsDomain_019c0020-9c23-7e30-b9fd-6421d7751337" xlink:to="loc_ifrs-full_FinancialAssetsAtAmortisedCostCategoryMember_019c0020-9c23-7a32-bbcc-1eebb42eb109" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_FinancialAssetsAtFairValueThroughProfitOrLossCategoryMember_019c0020-9c23-72ce-943a-c349297c8362" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_FinancialAssetsAtFairValueThroughProfitOrLossCategoryMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_CategoriesOfFinancialAssetsDomain_019c0020-9c23-7e30-b9fd-6421d7751337" xlink:to="loc_ifrs-full_FinancialAssetsAtFairValueThroughProfitOrLossCategoryMember_019c0020-9c23-72ce-943a-c349297c8362" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfFinancialAssetsAxis_019c0020-9c24-74df-990a-a77778fbddc2" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfFinancialAssetsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfFinancialInstrumentsTable_019c0020-9c23-7a76-b9e5-ef1c423a1d5a" xlink:to="loc_ifrs-full_ClassesOfFinancialAssetsAxis_019c0020-9c24-74df-990a-a77778fbddc2" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfFinancialAssetsDomain_019c0020-9c24-74df-990a-a77778fbddc2_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfFinancialAssetsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_ClassesOfFinancialAssetsAxis_019c0020-9c24-74df-990a-a77778fbddc2" xlink:to="loc_ifrs-full_ClassesOfFinancialAssetsDomain_019c0020-9c24-74df-990a-a77778fbddc2_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfFinancialAssetsDomain_019c0020-9c24-7b7d-98e3-447ee61f5e74" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfFinancialAssetsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_ClassesOfFinancialAssetsAxis_019c0020-9c24-74df-990a-a77778fbddc2" xlink:to="loc_ifrs-full_ClassesOfFinancialAssetsDomain_019c0020-9c24-7b7d-98e3-447ee61f5e74" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TradeReceivablesMember_019c0020-9c24-7721-a4c0-f9bbc5554ed3" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TradeReceivablesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfFinancialAssetsDomain_019c0020-9c24-7b7d-98e3-447ee61f5e74" xlink:to="loc_ifrs-full_TradeReceivablesMember_019c0020-9c24-7721-a4c0-f9bbc5554ed3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_OtherReceivablesNetMember_019c0020-9c24-7987-b3ff-400a89484ef8" xlink:href="ttam-20251231.xsd#ttam_OtherReceivablesNetMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfFinancialAssetsDomain_019c0020-9c24-7b7d-98e3-447ee61f5e74" xlink:to="loc_ttam_OtherReceivablesNetMember_019c0020-9c24-7987-b3ff-400a89484ef8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_OtherAssetsNonCurrentMember_019c0020-9c24-73b5-9bcb-4956dc1cd4c7" xlink:href="ttam-20251231.xsd#ttam_OtherAssetsNonCurrentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfFinancialAssetsDomain_019c0020-9c24-7b7d-98e3-447ee61f5e74" xlink:to="loc_ttam_OtherAssetsNonCurrentMember_019c0020-9c24-73b5-9bcb-4956dc1cd4c7" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DerivativesMember_019c0020-9c24-7c08-96b1-8d4d0af8ecaa" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DerivativesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfFinancialAssetsDomain_019c0020-9c24-7b7d-98e3-447ee61f5e74" xlink:to="loc_ifrs-full_DerivativesMember_019c0020-9c24-7c08-96b1-8d4d0af8ecaa" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_DerivativeAssetsCreditSupportPaymentsMember_019c0020-9c24-78d2-9354-ff369d2f1136" xlink:href="ttam-20251231.xsd#ttam_DerivativeAssetsCreditSupportPaymentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfFinancialAssetsDomain_019c0020-9c24-7b7d-98e3-447ee61f5e74" xlink:to="loc_ttam_DerivativeAssetsCreditSupportPaymentsMember_019c0020-9c24-78d2-9354-ff369d2f1136" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_CashAndCashEquivalents1Member_019c0020-9c24-789f-b840-24320a63031f" xlink:href="ttam-20251231.xsd#ttam_CashAndCashEquivalents1Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfFinancialAssetsDomain_019c0020-9c24-7b7d-98e3-447ee61f5e74" xlink:to="loc_ttam_CashAndCashEquivalents1Member_019c0020-9c24-789f-b840-24320a63031f" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_FinancialAssets_019c0020-9c24-72a7-a2c4-b4b345849012" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_FinancialAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfFinancialInstrumentsLineItems_019c0020-9c24-7ae4-b729-48fb1773b5dd" xlink:to="loc_ifrs-full_FinancialAssets_019c0020-9c24-72a7-a2c4-b4b345849012" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.titanamerica.com/role/FinancialriskmanagementobjectivesandpoliciesFinancialLiabilitiesDetails" xlink:type="simple" xlink:href="ttam-20251231.xsd#FinancialriskmanagementobjectivesandpoliciesFinancialLiabilitiesDetails"/>
  <link:definitionLink xlink:role="http://www.titanamerica.com/role/FinancialriskmanagementobjectivesandpoliciesFinancialLiabilitiesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfFinancialInstrumentsLineItems_019c0020-9c24-7255-896c-2c0532f05cfe" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfFinancialInstrumentsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfFinancialInstrumentsTable_019c0020-9c24-7742-b497-c3b4d9cad6af" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfFinancialInstrumentsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfFinancialInstrumentsLineItems_019c0020-9c24-7255-896c-2c0532f05cfe" xlink:to="loc_ifrs-full_DisclosureOfFinancialInstrumentsTable_019c0020-9c24-7742-b497-c3b4d9cad6af" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CategoriesOfFinancialLiabilitiesAxis_019c0020-9c24-70e4-9c8f-e0d1846f68b1" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CategoriesOfFinancialLiabilitiesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfFinancialInstrumentsTable_019c0020-9c24-7742-b497-c3b4d9cad6af" xlink:to="loc_ifrs-full_CategoriesOfFinancialLiabilitiesAxis_019c0020-9c24-70e4-9c8f-e0d1846f68b1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CategoriesOfFinancialLiabilitiesDomain_019c0020-9c24-70e4-9c8f-e0d1846f68b1_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CategoriesOfFinancialLiabilitiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_CategoriesOfFinancialLiabilitiesAxis_019c0020-9c24-70e4-9c8f-e0d1846f68b1" xlink:to="loc_ifrs-full_CategoriesOfFinancialLiabilitiesDomain_019c0020-9c24-70e4-9c8f-e0d1846f68b1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CategoriesOfFinancialLiabilitiesDomain_019c0020-9c24-740d-ab63-91603b01b3b1" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CategoriesOfFinancialLiabilitiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_CategoriesOfFinancialLiabilitiesAxis_019c0020-9c24-70e4-9c8f-e0d1846f68b1" xlink:to="loc_ifrs-full_CategoriesOfFinancialLiabilitiesDomain_019c0020-9c24-740d-ab63-91603b01b3b1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_FinancialLiabilitiesAtAmortisedCostCategoryMember_019c0020-9c24-7d6b-89c4-8d3544053ba5" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_FinancialLiabilitiesAtAmortisedCostCategoryMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_CategoriesOfFinancialLiabilitiesDomain_019c0020-9c24-740d-ab63-91603b01b3b1" xlink:to="loc_ifrs-full_FinancialLiabilitiesAtAmortisedCostCategoryMember_019c0020-9c24-7d6b-89c4-8d3544053ba5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_FinancialLiabilitiesAtFairValueThroughProfitOrLossCategoryMember_019c0020-9c24-70d5-8209-db9d016949ab" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_FinancialLiabilitiesAtFairValueThroughProfitOrLossCategoryMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_CategoriesOfFinancialLiabilitiesDomain_019c0020-9c24-740d-ab63-91603b01b3b1" xlink:to="loc_ifrs-full_FinancialLiabilitiesAtFairValueThroughProfitOrLossCategoryMember_019c0020-9c24-70d5-8209-db9d016949ab" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfFinancialLiabilitiesAxis_019c0020-9c24-7448-85ef-01b579e66029" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfFinancialLiabilitiesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfFinancialInstrumentsTable_019c0020-9c24-7742-b497-c3b4d9cad6af" xlink:to="loc_ifrs-full_ClassesOfFinancialLiabilitiesAxis_019c0020-9c24-7448-85ef-01b579e66029" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfFinancialLiabilitiesDomain_019c0020-9c24-7448-85ef-01b579e66029_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfFinancialLiabilitiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_ClassesOfFinancialLiabilitiesAxis_019c0020-9c24-7448-85ef-01b579e66029" xlink:to="loc_ifrs-full_ClassesOfFinancialLiabilitiesDomain_019c0020-9c24-7448-85ef-01b579e66029_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfFinancialLiabilitiesDomain_019c0020-9c24-73dc-9d75-57be5116f96c" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfFinancialLiabilitiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_ClassesOfFinancialLiabilitiesAxis_019c0020-9c24-7448-85ef-01b579e66029" xlink:to="loc_ifrs-full_ClassesOfFinancialLiabilitiesDomain_019c0020-9c24-73dc-9d75-57be5116f96c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_AccountsPayable1Member_019c0020-9c24-7508-9d1e-bcb11220ddc4" xlink:href="ttam-20251231.xsd#ttam_AccountsPayable1Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfFinancialLiabilitiesDomain_019c0020-9c24-73dc-9d75-57be5116f96c" xlink:to="loc_ttam_AccountsPayable1Member_019c0020-9c24-7508-9d1e-bcb11220ddc4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_RelatedPartyPayablesMember_019c0020-9c24-7901-bf57-d7c272f1cc3b" xlink:href="ttam-20251231.xsd#ttam_RelatedPartyPayablesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfFinancialLiabilitiesDomain_019c0020-9c24-73dc-9d75-57be5116f96c" xlink:to="loc_ttam_RelatedPartyPayablesMember_019c0020-9c24-7901-bf57-d7c272f1cc3b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_Borrowings1Member_019c0020-9c24-751f-b830-8800b39f782a" xlink:href="ttam-20251231.xsd#ttam_Borrowings1Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfFinancialLiabilitiesDomain_019c0020-9c24-73dc-9d75-57be5116f96c" xlink:to="loc_ttam_Borrowings1Member_019c0020-9c24-751f-b830-8800b39f782a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_DerivativeFinancialInstrumentsEconomicHedgesMember_019c0020-9c24-7780-aea3-366c797ac5af" xlink:href="ttam-20251231.xsd#ttam_DerivativeFinancialInstrumentsEconomicHedgesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfFinancialLiabilitiesDomain_019c0020-9c24-73dc-9d75-57be5116f96c" xlink:to="loc_ttam_DerivativeFinancialInstrumentsEconomicHedgesMember_019c0020-9c24-7780-aea3-366c797ac5af" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_DerivativeCreditSupportReceiptsMember_019c0020-9c24-719b-bbee-cc2c68539c53" xlink:href="ttam-20251231.xsd#ttam_DerivativeCreditSupportReceiptsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfFinancialLiabilitiesDomain_019c0020-9c24-73dc-9d75-57be5116f96c" xlink:to="loc_ttam_DerivativeCreditSupportReceiptsMember_019c0020-9c24-719b-bbee-cc2c68539c53" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_OtherNonCurrentLiabilitiesMember_019c0020-9c24-709e-a0cc-0ac08473aa10" xlink:href="ttam-20251231.xsd#ttam_OtherNonCurrentLiabilitiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfFinancialLiabilitiesDomain_019c0020-9c24-73dc-9d75-57be5116f96c" xlink:to="loc_ttam_OtherNonCurrentLiabilitiesMember_019c0020-9c24-709e-a0cc-0ac08473aa10" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_FinancialLiabilities_019c0020-9c24-7bf5-8e87-b2561ae6332f" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_FinancialLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfFinancialInstrumentsLineItems_019c0020-9c24-7255-896c-2c0532f05cfe" xlink:to="loc_ifrs-full_FinancialLiabilities_019c0020-9c24-7bf5-8e87-b2561ae6332f" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.titanamerica.com/role/EarningspershareDetails" xlink:type="simple" xlink:href="ttam-20251231.xsd#EarningspershareDetails"/>
  <link:definitionLink xlink:role="http://www.titanamerica.com/role/EarningspershareDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_EarningsPerShareLineItems_019c0020-9c24-72ec-94af-36d56f5e81ac" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_EarningsPerShareLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_EarningsPerShareTable_019c0020-9c24-7ce6-b77a-582981e2faa6" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_EarningsPerShareTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_EarningsPerShareLineItems_019c0020-9c24-72ec-94af-36d56f5e81ac" xlink:to="loc_ifrs-full_EarningsPerShareTable_019c0020-9c24-7ce6-b77a-582981e2faa6" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfShareCapitalAxis_019c0020-9c24-75ed-bd91-26d43b865762" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfShareCapitalAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_EarningsPerShareTable_019c0020-9c24-7ce6-b77a-582981e2faa6" xlink:to="loc_ifrs-full_ClassesOfShareCapitalAxis_019c0020-9c24-75ed-bd91-26d43b865762" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfShareCapitalDomain_019c0020-9c24-75ed-bd91-26d43b865762_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfShareCapitalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_ClassesOfShareCapitalAxis_019c0020-9c24-75ed-bd91-26d43b865762" xlink:to="loc_ifrs-full_ClassesOfShareCapitalDomain_019c0020-9c24-75ed-bd91-26d43b865762_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfShareCapitalDomain_019c0020-9c24-779c-a6dc-efad9afe8aea" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfShareCapitalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_ClassesOfShareCapitalAxis_019c0020-9c24-75ed-bd91-26d43b865762" xlink:to="loc_ifrs-full_ClassesOfShareCapitalDomain_019c0020-9c24-779c-a6dc-efad9afe8aea" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_OrdinarySharesTitanAtlanticCementIndustrialAndCommercialS.A.Member_019c0020-9c24-7e5f-a486-8714d022f44f" xlink:href="ttam-20251231.xsd#ttam_OrdinarySharesTitanAtlanticCementIndustrialAndCommercialS.A.Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfShareCapitalDomain_019c0020-9c24-779c-a6dc-efad9afe8aea" xlink:to="loc_ttam_OrdinarySharesTitanAtlanticCementIndustrialAndCommercialS.A.Member_019c0020-9c24-7e5f-a486-8714d022f44f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_OrdinarySharesTitanAmericaSAMember_019c0020-9c24-789f-9ae5-e62448e8513a" xlink:href="ttam-20251231.xsd#ttam_OrdinarySharesTitanAmericaSAMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfShareCapitalDomain_019c0020-9c24-779c-a6dc-efad9afe8aea" xlink:to="loc_ttam_OrdinarySharesTitanAmericaSAMember_019c0020-9c24-789f-9ae5-e62448e8513a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_WeightedAverageShares_019c0020-9c24-7bb6-846e-be2b58e0d625" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_WeightedAverageShares"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_EarningsPerShareLineItems_019c0020-9c24-72ec-94af-36d56f5e81ac" xlink:to="loc_ifrs-full_WeightedAverageShares_019c0020-9c24-7bb6-846e-be2b58e0d625" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AdjustedWeightedAverageShares_019c0020-9c24-72b1-b3a3-b5b6b0bd7b38" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_AdjustedWeightedAverageShares"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_EarningsPerShareLineItems_019c0020-9c24-72ec-94af-36d56f5e81ac" xlink:to="loc_ifrs-full_AdjustedWeightedAverageShares_019c0020-9c24-72b1-b3a3-b5b6b0bd7b38" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ProfitLoss_019c8ec5-3de3-708a-af10-5cacef88aadd" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ProfitLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_EarningsPerShareLineItems_019c0020-9c24-72ec-94af-36d56f5e81ac" xlink:to="loc_ifrs-full_ProfitLoss_019c8ec5-3de3-708a-af10-5cacef88aadd" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ProfitLossAttributableToOrdinaryEquityHoldersOfParentEntity_019c0020-9c24-7a95-93cf-e63788f12817" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ProfitLossAttributableToOrdinaryEquityHoldersOfParentEntity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_EarningsPerShareLineItems_019c0020-9c24-72ec-94af-36d56f5e81ac" xlink:to="loc_ifrs-full_ProfitLossAttributableToOrdinaryEquityHoldersOfParentEntity_019c0020-9c24-7a95-93cf-e63788f12817" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BasicEarningsLossPerShare_019c0020-9c24-7fd1-9485-90fcb2159601" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BasicEarningsLossPerShare"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_EarningsPerShareLineItems_019c0020-9c24-72ec-94af-36d56f5e81ac" xlink:to="loc_ifrs-full_BasicEarningsLossPerShare_019c0020-9c24-7fd1-9485-90fcb2159601" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DilutedEarningsLossPerShare_019c0020-9c24-741d-8d44-7ce1ad6677db" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DilutedEarningsLossPerShare"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_EarningsPerShareLineItems_019c0020-9c24-72ec-94af-36d56f5e81ac" xlink:to="loc_ifrs-full_DilutedEarningsLossPerShare_019c0020-9c24-741d-8d44-7ce1ad6677db" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_NumberOfSharesIssuedAndFullyPaidReorganization_019c0020-9c24-7528-9b70-828a4e8e1b7d" xlink:href="ttam-20251231.xsd#ttam_NumberOfSharesIssuedAndFullyPaidReorganization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_EarningsPerShareLineItems_019c0020-9c24-72ec-94af-36d56f5e81ac" xlink:to="loc_ttam_NumberOfSharesIssuedAndFullyPaidReorganization_019c0020-9c24-7528-9b70-828a4e8e1b7d" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_IssueOfEquityShares_019c0020-9c24-7314-95fc-4b12c369e77f" xlink:href="ttam-20251231.xsd#ttam_IssueOfEquityShares"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_EarningsPerShareLineItems_019c0020-9c24-72ec-94af-36d56f5e81ac" xlink:to="loc_ttam_IssueOfEquityShares_019c0020-9c24-7314-95fc-4b12c369e77f" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_IssueOfEquitySharesIssuedUponConversion_019c0020-9c24-77a8-b8ed-04624395f4b6" xlink:href="ttam-20251231.xsd#ttam_IssueOfEquitySharesIssuedUponConversion"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_EarningsPerShareLineItems_019c0020-9c24-72ec-94af-36d56f5e81ac" xlink:to="loc_ttam_IssueOfEquitySharesIssuedUponConversion_019c0020-9c24-77a8-b8ed-04624395f4b6" xlink:type="arc" order="8"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.titanamerica.com/role/SegmentinformationSegmentadjustedEBITDADetails" xlink:type="simple" xlink:href="ttam-20251231.xsd#SegmentinformationSegmentadjustedEBITDADetails"/>
  <link:definitionLink xlink:role="http://www.titanamerica.com/role/SegmentinformationSegmentadjustedEBITDADetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfOperatingSegmentsLineItems_019c0020-9c24-7cdf-8c33-3eb57607e6c5" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfOperatingSegmentsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfOperatingSegmentsTable_019c0020-9c24-7686-be8c-d1ac05db8ce9" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfOperatingSegmentsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfOperatingSegmentsLineItems_019c0020-9c24-7cdf-8c33-3eb57607e6c5" xlink:to="loc_ifrs-full_DisclosureOfOperatingSegmentsTable_019c0020-9c24-7686-be8c-d1ac05db8ce9" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_SegmentConsolidationItemsAxis_019c0020-9c24-79cf-a15d-2a3e73cb018a" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_SegmentConsolidationItemsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfOperatingSegmentsTable_019c0020-9c24-7686-be8c-d1ac05db8ce9" xlink:to="loc_ifrs-full_SegmentConsolidationItemsAxis_019c0020-9c24-79cf-a15d-2a3e73cb018a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_SegmentConsolidationItemsDomain_019c0020-9c24-79cf-a15d-2a3e73cb018a_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_SegmentConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_SegmentConsolidationItemsAxis_019c0020-9c24-79cf-a15d-2a3e73cb018a" xlink:to="loc_ifrs-full_SegmentConsolidationItemsDomain_019c0020-9c24-79cf-a15d-2a3e73cb018a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_SegmentConsolidationItemsDomain_019c0020-9c24-71d8-800f-f07acc116aa4" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_SegmentConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_SegmentConsolidationItemsAxis_019c0020-9c24-79cf-a15d-2a3e73cb018a" xlink:to="loc_ifrs-full_SegmentConsolidationItemsDomain_019c0020-9c24-71d8-800f-f07acc116aa4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_OperatingSegmentsMember_019c0020-9c24-7029-9b21-113e558932d6" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_OperatingSegmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_SegmentConsolidationItemsDomain_019c0020-9c24-71d8-800f-f07acc116aa4" xlink:to="loc_ifrs-full_OperatingSegmentsMember_019c0020-9c24-7029-9b21-113e558932d6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_UnallocatedAmountsMember_019c0020-9c24-781c-81d9-5c0eb2b97f3b" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_UnallocatedAmountsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_SegmentConsolidationItemsDomain_019c0020-9c24-71d8-800f-f07acc116aa4" xlink:to="loc_ifrs-full_UnallocatedAmountsMember_019c0020-9c24-781c-81d9-5c0eb2b97f3b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_SegmentsAxis_019c0020-9c24-7387-b763-9aabb2a5386d" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_SegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfOperatingSegmentsTable_019c0020-9c24-7686-be8c-d1ac05db8ce9" xlink:to="loc_ifrs-full_SegmentsAxis_019c0020-9c24-7387-b763-9aabb2a5386d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_SegmentsDomain_019c0020-9c24-7387-b763-9aabb2a5386d_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_SegmentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_SegmentsAxis_019c0020-9c24-7387-b763-9aabb2a5386d" xlink:to="loc_ifrs-full_SegmentsDomain_019c0020-9c24-7387-b763-9aabb2a5386d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_SegmentsDomain_019c0020-9c24-7c66-9c9c-5979a20ca024" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_SegmentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_SegmentsAxis_019c0020-9c24-7387-b763-9aabb2a5386d" xlink:to="loc_ifrs-full_SegmentsDomain_019c0020-9c24-7c66-9c9c-5979a20ca024" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ReportableSegmentsMember_019c0020-9c24-7dfa-807a-7ecb8176d334" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ReportableSegmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_SegmentsDomain_019c0020-9c24-7c66-9c9c-5979a20ca024" xlink:to="loc_ifrs-full_ReportableSegmentsMember_019c0020-9c24-7dfa-807a-7ecb8176d334" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_FloridaBusinessReportableSegmentMember_019c0020-9c24-790e-8b6c-063d3186b16f" xlink:href="ttam-20251231.xsd#ttam_FloridaBusinessReportableSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ReportableSegmentsMember_019c0020-9c24-7dfa-807a-7ecb8176d334" xlink:to="loc_ttam_FloridaBusinessReportableSegmentMember_019c0020-9c24-790e-8b6c-063d3186b16f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_MidAtlanticBusinessReportableSegmentMember_019c0020-9c24-731f-aae0-a471030a7b75" xlink:href="ttam-20251231.xsd#ttam_MidAtlanticBusinessReportableSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ReportableSegmentsMember_019c0020-9c24-7dfa-807a-7ecb8176d334" xlink:to="loc_ttam_MidAtlanticBusinessReportableSegmentMember_019c0020-9c24-731f-aae0-a471030a7b75" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_STETNonreportableSegmentMember_019c0020-9c24-7bc1-9429-87a9a209d847" xlink:href="ttam-20251231.xsd#ttam_STETNonreportableSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_SegmentsDomain_019c0020-9c24-7c66-9c9c-5979a20ca024" xlink:to="loc_ttam_STETNonreportableSegmentMember_019c0020-9c24-7bc1-9429-87a9a209d847" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_EarningsBeforeInterestTaxesDepreciationAndAmortization_019c0020-9c24-7f4c-8671-478a085681dc" xlink:href="ttam-20251231.xsd#ttam_EarningsBeforeInterestTaxesDepreciationAndAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfOperatingSegmentsLineItems_019c0020-9c24-7cdf-8c33-3eb57607e6c5" xlink:to="loc_ttam_EarningsBeforeInterestTaxesDepreciationAndAmortization_019c0020-9c24-7f4c-8671-478a085681dc" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_FinanceCosts_019c0020-9c24-7066-902a-432271068968" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_FinanceCosts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfOperatingSegmentsLineItems_019c0020-9c24-7cdf-8c33-3eb57607e6c5" xlink:to="loc_ifrs-full_FinanceCosts_019c0020-9c24-7066-902a-432271068968" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DepreciationAndAmortisationExpense_019c0020-9c24-7ade-b2e5-7a5712cf5d97" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DepreciationAndAmortisationExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfOperatingSegmentsLineItems_019c0020-9c24-7cdf-8c33-3eb57607e6c5" xlink:to="loc_ifrs-full_DepreciationAndAmortisationExpense_019c0020-9c24-7ade-b2e5-7a5712cf5d97" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_GainsLossesOnDisposalsOfNoncurrentAssets_019c0020-9c24-7e7e-be91-1cf22e54177c" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_GainsLossesOnDisposalsOfNoncurrentAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfOperatingSegmentsLineItems_019c0020-9c24-7cdf-8c33-3eb57607e6c5" xlink:to="loc_ifrs-full_GainsLossesOnDisposalsOfNoncurrentAssets_019c0020-9c24-7e7e-be91-1cf22e54177c" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_ImpairmentRecoveryLossOnFinancialAssets_019c0020-9c24-71dc-8aa2-1cacf6e9337b" xlink:href="ttam-20251231.xsd#ttam_ImpairmentRecoveryLossOnFinancialAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfOperatingSegmentsLineItems_019c0020-9c24-7cdf-8c33-3eb57607e6c5" xlink:to="loc_ttam_ImpairmentRecoveryLossOnFinancialAssets_019c0020-9c24-71dc-8aa2-1cacf6e9337b" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_GainsLossesOnExchangeDifferencesOnTranslationRecognisedInProfitOrLoss_019c0020-9c24-7865-ab34-69fa9743fe3b" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_GainsLossesOnExchangeDifferencesOnTranslationRecognisedInProfitOrLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfOperatingSegmentsLineItems_019c0020-9c24-7cdf-8c33-3eb57607e6c5" xlink:to="loc_ifrs-full_GainsLossesOnExchangeDifferencesOnTranslationRecognisedInProfitOrLoss_019c0020-9c24-7865-ab34-69fa9743fe3b" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_GainsLossesOnChangeInFairValueOfDerivatives_019c0020-9c24-713f-9d1b-77e28402ab26" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_GainsLossesOnChangeInFairValueOfDerivatives"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfOperatingSegmentsLineItems_019c0020-9c24-7cdf-8c33-3eb57607e6c5" xlink:to="loc_ifrs-full_GainsLossesOnChangeInFairValueOfDerivatives_019c0020-9c24-713f-9d1b-77e28402ab26" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_GainsLossesRecognisedInProfitOrLossFairValueMeasurementAssets_019c0020-9c24-77d4-a422-d3a05c496f86" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_GainsLossesRecognisedInProfitOrLossFairValueMeasurementAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfOperatingSegmentsLineItems_019c0020-9c24-7cdf-8c33-3eb57607e6c5" xlink:to="loc_ifrs-full_GainsLossesRecognisedInProfitOrLossFairValueMeasurementAssets_019c0020-9c24-77d4-a422-d3a05c496f86" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ExpenseFromSharebasedPaymentTransactionsInWhichGoodsOrServicesReceivedDidNotQualifyForRecognitionAsAssets_019c0020-9c24-73ad-87fa-8f07d56498a4" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ExpenseFromSharebasedPaymentTransactionsInWhichGoodsOrServicesReceivedDidNotQualifyForRecognitionAsAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfOperatingSegmentsLineItems_019c0020-9c24-7cdf-8c33-3eb57607e6c5" xlink:to="loc_ifrs-full_ExpenseFromSharebasedPaymentTransactionsInWhichGoodsOrServicesReceivedDidNotQualifyForRecognitionAsAssets_019c0020-9c24-73ad-87fa-8f07d56498a4" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AcquisitionrelatedCostsForTransactionRecognisedSeparatelyFromAcquisitionOfAssetsAndAssumptionOfLiabilitiesInBusinessCombination_019cd7dc-3e1c-7412-b85e-3cace8c0ca8f" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_AcquisitionrelatedCostsForTransactionRecognisedSeparatelyFromAcquisitionOfAssetsAndAssumptionOfLiabilitiesInBusinessCombination"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfOperatingSegmentsLineItems_019c0020-9c24-7cdf-8c33-3eb57607e6c5" xlink:to="loc_ifrs-full_AcquisitionrelatedCostsForTransactionRecognisedSeparatelyFromAcquisitionOfAssetsAndAssumptionOfLiabilitiesInBusinessCombination_019cd7dc-3e1c-7412-b85e-3cace8c0ca8f" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_OtherGainsLosses_019c0020-9c24-70c6-a5d0-8f8ebcb83a4f" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_OtherGainsLosses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfOperatingSegmentsLineItems_019c0020-9c24-7cdf-8c33-3eb57607e6c5" xlink:to="loc_ifrs-full_OtherGainsLosses_019c0020-9c24-70c6-a5d0-8f8ebcb83a4f" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ProfitLossBeforeTax_019c0020-9c24-776b-a705-2702f9a31306" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ProfitLossBeforeTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfOperatingSegmentsLineItems_019c0020-9c24-7cdf-8c33-3eb57607e6c5" xlink:to="loc_ifrs-full_ProfitLossBeforeTax_019c0020-9c24-776b-a705-2702f9a31306" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_GainsLossesOnDisposalsOfInvestments_019cff75-6694-79f8-8915-de7ddcaf66be" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_GainsLossesOnDisposalsOfInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfOperatingSegmentsLineItems_019c0020-9c24-7cdf-8c33-3eb57607e6c5" xlink:to="loc_ifrs-full_GainsLossesOnDisposalsOfInvestments_019cff75-6694-79f8-8915-de7ddcaf66be" xlink:type="arc" order="12"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.titanamerica.com/role/SegmentinformationSegmentexternalrevenueDetails" xlink:type="simple" xlink:href="ttam-20251231.xsd#SegmentinformationSegmentexternalrevenueDetails"/>
  <link:definitionLink xlink:role="http://www.titanamerica.com/role/SegmentinformationSegmentexternalrevenueDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfOperatingSegmentsLineItems_019c0020-9c24-78d6-b2ce-a099df936412" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfOperatingSegmentsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfOperatingSegmentsTable_019c0020-9c24-7348-b64d-2510bf70dd01" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfOperatingSegmentsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfOperatingSegmentsLineItems_019c0020-9c24-78d6-b2ce-a099df936412" xlink:to="loc_ifrs-full_DisclosureOfOperatingSegmentsTable_019c0020-9c24-7348-b64d-2510bf70dd01" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_SegmentConsolidationItemsAxis_019c0020-9c24-7cd9-acf0-78e36db2e280" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_SegmentConsolidationItemsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfOperatingSegmentsTable_019c0020-9c24-7348-b64d-2510bf70dd01" xlink:to="loc_ifrs-full_SegmentConsolidationItemsAxis_019c0020-9c24-7cd9-acf0-78e36db2e280" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_SegmentConsolidationItemsDomain_019c0020-9c24-7cd9-acf0-78e36db2e280_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_SegmentConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_SegmentConsolidationItemsAxis_019c0020-9c24-7cd9-acf0-78e36db2e280" xlink:to="loc_ifrs-full_SegmentConsolidationItemsDomain_019c0020-9c24-7cd9-acf0-78e36db2e280_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_SegmentConsolidationItemsDomain_019c0020-9c24-7cd9-9eb4-4ceafc566540" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_SegmentConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_SegmentConsolidationItemsAxis_019c0020-9c24-7cd9-acf0-78e36db2e280" xlink:to="loc_ifrs-full_SegmentConsolidationItemsDomain_019c0020-9c24-7cd9-9eb4-4ceafc566540" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_OperatingSegmentsMember_019c0020-9c24-7a2d-b07c-9e56354cca99" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_OperatingSegmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_SegmentConsolidationItemsDomain_019c0020-9c24-7cd9-9eb4-4ceafc566540" xlink:to="loc_ifrs-full_OperatingSegmentsMember_019c0020-9c24-7a2d-b07c-9e56354cca99" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_SegmentsAxis_019c0020-9c24-7dc8-bce4-1ae66499d1dc" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_SegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfOperatingSegmentsTable_019c0020-9c24-7348-b64d-2510bf70dd01" xlink:to="loc_ifrs-full_SegmentsAxis_019c0020-9c24-7dc8-bce4-1ae66499d1dc" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_SegmentsDomain_019c0020-9c24-7dc8-bce4-1ae66499d1dc_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_SegmentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_SegmentsAxis_019c0020-9c24-7dc8-bce4-1ae66499d1dc" xlink:to="loc_ifrs-full_SegmentsDomain_019c0020-9c24-7dc8-bce4-1ae66499d1dc_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_SegmentsDomain_019c0020-9c24-7ce4-80fb-f2704460a7ee" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_SegmentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_SegmentsAxis_019c0020-9c24-7dc8-bce4-1ae66499d1dc" xlink:to="loc_ifrs-full_SegmentsDomain_019c0020-9c24-7ce4-80fb-f2704460a7ee" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_FloridaBusinessReportableSegmentMember_019c0020-9c24-7d2a-bc44-3334090e0d4c" xlink:href="ttam-20251231.xsd#ttam_FloridaBusinessReportableSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_SegmentsDomain_019c0020-9c24-7ce4-80fb-f2704460a7ee" xlink:to="loc_ttam_FloridaBusinessReportableSegmentMember_019c0020-9c24-7d2a-bc44-3334090e0d4c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_MidAtlanticBusinessReportableSegmentMember_019c0020-9c24-7c75-bbf2-12158cc6b36f" xlink:href="ttam-20251231.xsd#ttam_MidAtlanticBusinessReportableSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_SegmentsDomain_019c0020-9c24-7ce4-80fb-f2704460a7ee" xlink:to="loc_ttam_MidAtlanticBusinessReportableSegmentMember_019c0020-9c24-7c75-bbf2-12158cc6b36f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_STETNonreportableSegmentMember_019c0020-9c24-72d6-aa9a-c4f442163e93" xlink:href="ttam-20251231.xsd#ttam_STETNonreportableSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_SegmentsDomain_019c0020-9c24-7ce4-80fb-f2704460a7ee" xlink:to="loc_ttam_STETNonreportableSegmentMember_019c0020-9c24-72d6-aa9a-c4f442163e93" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RevenueFromContractsWithCustomers_019c0020-9c24-7e7d-8be8-b7f1ee30dc6c" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_RevenueFromContractsWithCustomers"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfOperatingSegmentsLineItems_019c0020-9c24-78d6-b2ce-a099df936412" xlink:to="loc_ifrs-full_RevenueFromContractsWithCustomers_019c0020-9c24-7e7d-8be8-b7f1ee30dc6c" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.titanamerica.com/role/SegmentinformationSegmentdepreciationdepletionandamortizationDetails" xlink:type="simple" xlink:href="ttam-20251231.xsd#SegmentinformationSegmentdepreciationdepletionandamortizationDetails"/>
  <link:definitionLink xlink:role="http://www.titanamerica.com/role/SegmentinformationSegmentdepreciationdepletionandamortizationDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfOperatingSegmentsLineItems_019c0020-9c24-77e3-810c-f3aa3d162e26" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfOperatingSegmentsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfOperatingSegmentsTable_019c0020-9c24-7e04-a065-50c601416330" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfOperatingSegmentsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfOperatingSegmentsLineItems_019c0020-9c24-77e3-810c-f3aa3d162e26" xlink:to="loc_ifrs-full_DisclosureOfOperatingSegmentsTable_019c0020-9c24-7e04-a065-50c601416330" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_SegmentConsolidationItemsAxis_019c0020-9c24-7ab9-994e-2d0dace88c19" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_SegmentConsolidationItemsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfOperatingSegmentsTable_019c0020-9c24-7e04-a065-50c601416330" xlink:to="loc_ifrs-full_SegmentConsolidationItemsAxis_019c0020-9c24-7ab9-994e-2d0dace88c19" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_SegmentConsolidationItemsDomain_019c0020-9c24-7ab9-994e-2d0dace88c19_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_SegmentConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_SegmentConsolidationItemsAxis_019c0020-9c24-7ab9-994e-2d0dace88c19" xlink:to="loc_ifrs-full_SegmentConsolidationItemsDomain_019c0020-9c24-7ab9-994e-2d0dace88c19_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_SegmentConsolidationItemsDomain_019c0020-9c24-7603-bd8b-a59012907f98" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_SegmentConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_SegmentConsolidationItemsAxis_019c0020-9c24-7ab9-994e-2d0dace88c19" xlink:to="loc_ifrs-full_SegmentConsolidationItemsDomain_019c0020-9c24-7603-bd8b-a59012907f98" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_OperatingSegmentsMember_019c0020-9c24-7904-9620-169932f324aa" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_OperatingSegmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_SegmentConsolidationItemsDomain_019c0020-9c24-7603-bd8b-a59012907f98" xlink:to="loc_ifrs-full_OperatingSegmentsMember_019c0020-9c24-7904-9620-169932f324aa" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_UnallocatedAmountsMember_019c0020-9c24-76e3-a1f9-e987e0a0b752" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_UnallocatedAmountsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_SegmentConsolidationItemsDomain_019c0020-9c24-7603-bd8b-a59012907f98" xlink:to="loc_ifrs-full_UnallocatedAmountsMember_019c0020-9c24-76e3-a1f9-e987e0a0b752" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_SegmentsAxis_019c0020-9c24-7ee1-b9cd-2ce91324375c" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_SegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfOperatingSegmentsTable_019c0020-9c24-7e04-a065-50c601416330" xlink:to="loc_ifrs-full_SegmentsAxis_019c0020-9c24-7ee1-b9cd-2ce91324375c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_SegmentsDomain_019c0020-9c24-7ee1-b9cd-2ce91324375c_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_SegmentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_SegmentsAxis_019c0020-9c24-7ee1-b9cd-2ce91324375c" xlink:to="loc_ifrs-full_SegmentsDomain_019c0020-9c24-7ee1-b9cd-2ce91324375c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_SegmentsDomain_019c0020-9c24-738c-bf70-a735ded73ac3" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_SegmentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_SegmentsAxis_019c0020-9c24-7ee1-b9cd-2ce91324375c" xlink:to="loc_ifrs-full_SegmentsDomain_019c0020-9c24-738c-bf70-a735ded73ac3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_FloridaBusinessReportableSegmentMember_019c0020-9c24-7f55-8f4c-1b615af71155" xlink:href="ttam-20251231.xsd#ttam_FloridaBusinessReportableSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_SegmentsDomain_019c0020-9c24-738c-bf70-a735ded73ac3" xlink:to="loc_ttam_FloridaBusinessReportableSegmentMember_019c0020-9c24-7f55-8f4c-1b615af71155" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_MidAtlanticBusinessReportableSegmentMember_019c0020-9c24-7969-acac-95d7d50408db" xlink:href="ttam-20251231.xsd#ttam_MidAtlanticBusinessReportableSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_SegmentsDomain_019c0020-9c24-738c-bf70-a735ded73ac3" xlink:to="loc_ttam_MidAtlanticBusinessReportableSegmentMember_019c0020-9c24-7969-acac-95d7d50408db" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_STETNonreportableSegmentMember_019c0020-9c24-7975-9c02-4272b663b767" xlink:href="ttam-20251231.xsd#ttam_STETNonreportableSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_SegmentsDomain_019c0020-9c24-738c-bf70-a735ded73ac3" xlink:to="loc_ttam_STETNonreportableSegmentMember_019c0020-9c24-7975-9c02-4272b663b767" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DepreciationAndAmortisationExpense_019c0020-9c24-7218-b2a0-4873a3f0450e" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DepreciationAndAmortisationExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfOperatingSegmentsLineItems_019c0020-9c24-77e3-810c-f3aa3d162e26" xlink:to="loc_ifrs-full_DepreciationAndAmortisationExpense_019c0020-9c24-7218-b2a0-4873a3f0450e" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.titanamerica.com/role/SegmentinformationSegmentcapitalspendingDetails" xlink:type="simple" xlink:href="ttam-20251231.xsd#SegmentinformationSegmentcapitalspendingDetails"/>
  <link:definitionLink xlink:role="http://www.titanamerica.com/role/SegmentinformationSegmentcapitalspendingDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfOperatingSegmentsLineItems_019c0020-9c24-73b7-98f4-af4004e32b14" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfOperatingSegmentsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfOperatingSegmentsTable_019c0020-9c24-7b6a-93f5-5df95e335d4c" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfOperatingSegmentsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfOperatingSegmentsLineItems_019c0020-9c24-73b7-98f4-af4004e32b14" xlink:to="loc_ifrs-full_DisclosureOfOperatingSegmentsTable_019c0020-9c24-7b6a-93f5-5df95e335d4c" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_SegmentConsolidationItemsAxis_019c0020-9c24-7810-a2f4-70f35a8b351d" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_SegmentConsolidationItemsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfOperatingSegmentsTable_019c0020-9c24-7b6a-93f5-5df95e335d4c" xlink:to="loc_ifrs-full_SegmentConsolidationItemsAxis_019c0020-9c24-7810-a2f4-70f35a8b351d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_SegmentConsolidationItemsDomain_019c0020-9c24-7810-a2f4-70f35a8b351d_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_SegmentConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_SegmentConsolidationItemsAxis_019c0020-9c24-7810-a2f4-70f35a8b351d" xlink:to="loc_ifrs-full_SegmentConsolidationItemsDomain_019c0020-9c24-7810-a2f4-70f35a8b351d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_SegmentConsolidationItemsDomain_019c0020-9c24-7d3d-aa24-0674d1146738" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_SegmentConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_SegmentConsolidationItemsAxis_019c0020-9c24-7810-a2f4-70f35a8b351d" xlink:to="loc_ifrs-full_SegmentConsolidationItemsDomain_019c0020-9c24-7d3d-aa24-0674d1146738" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_OperatingSegmentsMember_019c0020-9c24-7bcc-b6ce-8da2ce099a9d" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_OperatingSegmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_SegmentConsolidationItemsDomain_019c0020-9c24-7d3d-aa24-0674d1146738" xlink:to="loc_ifrs-full_OperatingSegmentsMember_019c0020-9c24-7bcc-b6ce-8da2ce099a9d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_UnallocatedAmountsMember_019c0020-9c24-7c17-a1f4-310567221698" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_UnallocatedAmountsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_SegmentConsolidationItemsDomain_019c0020-9c24-7d3d-aa24-0674d1146738" xlink:to="loc_ifrs-full_UnallocatedAmountsMember_019c0020-9c24-7c17-a1f4-310567221698" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_SegmentsAxis_019c0020-9c24-7024-9093-52129141ace6" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_SegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfOperatingSegmentsTable_019c0020-9c24-7b6a-93f5-5df95e335d4c" xlink:to="loc_ifrs-full_SegmentsAxis_019c0020-9c24-7024-9093-52129141ace6" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_SegmentsDomain_019c0020-9c24-7024-9093-52129141ace6_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_SegmentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_SegmentsAxis_019c0020-9c24-7024-9093-52129141ace6" xlink:to="loc_ifrs-full_SegmentsDomain_019c0020-9c24-7024-9093-52129141ace6_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_SegmentsDomain_019c0020-9c24-7769-81a2-8bcbdcfcff04" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_SegmentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_SegmentsAxis_019c0020-9c24-7024-9093-52129141ace6" xlink:to="loc_ifrs-full_SegmentsDomain_019c0020-9c24-7769-81a2-8bcbdcfcff04" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_FloridaBusinessReportableSegmentMember_019c0020-9c24-706e-a277-95466136debf" xlink:href="ttam-20251231.xsd#ttam_FloridaBusinessReportableSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_SegmentsDomain_019c0020-9c24-7769-81a2-8bcbdcfcff04" xlink:to="loc_ttam_FloridaBusinessReportableSegmentMember_019c0020-9c24-706e-a277-95466136debf" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_MidAtlanticBusinessReportableSegmentMember_019c0020-9c24-7182-a528-2ea4f10bda86" xlink:href="ttam-20251231.xsd#ttam_MidAtlanticBusinessReportableSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_SegmentsDomain_019c0020-9c24-7769-81a2-8bcbdcfcff04" xlink:to="loc_ttam_MidAtlanticBusinessReportableSegmentMember_019c0020-9c24-7182-a528-2ea4f10bda86" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_STETNonreportableSegmentMember_019c0020-9c24-76e5-a342-2c290155fe65" xlink:href="ttam-20251231.xsd#ttam_STETNonreportableSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_SegmentsDomain_019c0020-9c24-7769-81a2-8bcbdcfcff04" xlink:to="loc_ttam_STETNonreportableSegmentMember_019c0020-9c24-76e5-a342-2c290155fe65" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_PurchaseOfPropertyPlantAndEquipmentIntangibleAssetsOtherThanGoodwillExcludingAdditionsToQuarries_019c0020-9c24-7837-952e-aff26da0d1e1" xlink:href="ttam-20251231.xsd#ttam_PurchaseOfPropertyPlantAndEquipmentIntangibleAssetsOtherThanGoodwillExcludingAdditionsToQuarries"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfOperatingSegmentsLineItems_019c0020-9c24-73b7-98f4-af4004e32b14" xlink:to="loc_ttam_PurchaseOfPropertyPlantAndEquipmentIntangibleAssetsOtherThanGoodwillExcludingAdditionsToQuarries_019c0020-9c24-7837-952e-aff26da0d1e1" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.titanamerica.com/role/EventsafterreportingperiodDetails" xlink:type="simple" xlink:href="ttam-20251231.xsd#EventsafterreportingperiodDetails"/>
  <link:definitionLink xlink:role="http://www.titanamerica.com/role/EventsafterreportingperiodDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodLineItems_019c8ef4-ddb1-7239-b207-cb12ed364f5b" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodTable_019c0020-9c24-75ff-ba31-cd9527b20896" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodLineItems_019c8ef4-ddb1-7239-b207-cb12ed364f5b" xlink:to="loc_ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodTable_019c0020-9c24-75ff-ba31-cd9527b20896" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BusinessCombinationsAxis_019c8ef4-ddb1-7806-b31b-04cc7dccc80f" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BusinessCombinationsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodTable_019c0020-9c24-75ff-ba31-cd9527b20896" xlink:to="loc_ifrs-full_BusinessCombinationsAxis_019c8ef4-ddb1-7806-b31b-04cc7dccc80f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BusinessCombinationsDomain_019c8ef4-ddb1-7806-b31b-04cc7dccc80f_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BusinessCombinationsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_BusinessCombinationsAxis_019c8ef4-ddb1-7806-b31b-04cc7dccc80f" xlink:to="loc_ifrs-full_BusinessCombinationsDomain_019c8ef4-ddb1-7806-b31b-04cc7dccc80f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BusinessCombinationsDomain_019c8ef4-ddb1-7a05-a33b-dd7a0877b2b7" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BusinessCombinationsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_BusinessCombinationsAxis_019c8ef4-ddb1-7806-b31b-04cc7dccc80f" xlink:to="loc_ifrs-full_BusinessCombinationsDomain_019c8ef4-ddb1-7a05-a33b-dd7a0877b2b7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ttam_KeystoneCementCompanyMember_019c8ef4-ddb1-77f5-b1b4-bc01b5690d1a" xlink:href="ttam-20251231.xsd#ttam_KeystoneCementCompanyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BusinessCombinationsDomain_019c8ef4-ddb1-7a05-a33b-dd7a0877b2b7" xlink:to="loc_ttam_KeystoneCementCompanyMember_019c8ef4-ddb1-77f5-b1b4-bc01b5690d1a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NonadjustingEventsAfterReportingPeriodAxis_019c8ef4-ddb1-7f21-809c-4c19e7d3226c" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NonadjustingEventsAfterReportingPeriodAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodTable_019c0020-9c24-75ff-ba31-cd9527b20896" xlink:to="loc_ifrs-full_NonadjustingEventsAfterReportingPeriodAxis_019c8ef4-ddb1-7f21-809c-4c19e7d3226c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NonadjustingEventsAfterReportingPeriodDomain_019c8ef4-ddb1-7f21-809c-4c19e7d3226c_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NonadjustingEventsAfterReportingPeriodDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_NonadjustingEventsAfterReportingPeriodAxis_019c8ef4-ddb1-7f21-809c-4c19e7d3226c" xlink:to="loc_ifrs-full_NonadjustingEventsAfterReportingPeriodDomain_019c8ef4-ddb1-7f21-809c-4c19e7d3226c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NonadjustingEventsAfterReportingPeriodDomain_019c8ef4-ddb1-7c6e-b98d-d0e50b308078" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NonadjustingEventsAfterReportingPeriodDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_NonadjustingEventsAfterReportingPeriodAxis_019c8ef4-ddb1-7f21-809c-4c19e7d3226c" xlink:to="loc_ifrs-full_NonadjustingEventsAfterReportingPeriodDomain_019c8ef4-ddb1-7c6e-b98d-d0e50b308078" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_MajorBusinessCombinationMember_019c8ef4-ddb1-795e-b55c-5e0b2fe88ad5" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_MajorBusinessCombinationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_NonadjustingEventsAfterReportingPeriodDomain_019c8ef4-ddb1-7c6e-b98d-d0e50b308078" xlink:to="loc_ifrs-full_MajorBusinessCombinationMember_019c8ef4-ddb1-795e-b55c-5e0b2fe88ad5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AcquisitiondateFairValueOfTotalConsiderationTransferred_019c8ef4-ddb1-7f97-8ac1-e36418b495b7" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_AcquisitiondateFairValueOfTotalConsiderationTransferred"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodLineItems_019c8ef4-ddb1-7239-b207-cb12ed364f5b" xlink:to="loc_ifrs-full_AcquisitiondateFairValueOfTotalConsiderationTransferred_019c8ef4-ddb1-7f97-8ac1-e36418b495b7" xlink:type="arc" order="0"/>
  </link:definitionLink>
</link:linkbase>
