<p>This study meticulously investigates the influence of low-temperature ageing following ECAP on the microstructural characteristics and mechanical properties of the 7075 alloy enriched with Ag and Sn. The influence of microstructural characteristics and the presence of different precipitates on mechanical properties have been evaluated by X-ray diffraction (XRD), electron backscattered diffraction (EBSD), transmission electron microscopy (TEM), and differential scanning calorimetry (DSC). Significant grain refinement was noticed for all three alloys (7075, Ag, and Sn added) after being processed by post-ECAP peak ageing condition. TEM exposed the existence of both η′ and η precipitates in the post-ECAP peak ageing conditions. Notably, the dimensions of the η′ and η precipitates in alloys enhanced with Ag and Sn were more refined compared to those in the base alloy. Tensile tests revealed that post-ECAP ageing treatment greatly improved the hardness, yield strength (YS), and ultimate tensile strength (UTS) values compared to the initial as-solutionized condition for all three alloys. Notably, the alloy containing Ag exhibited the most substantial improvements when contrasted to the base and Sn-added alloys. The improvement of mechanical properties was associated with solid solution strengthening, grain refinement, dislocation strengthening, and precipitates strengthening. Texture analysis revealed the development of strong <InlineEquation ID="IEq1"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="10853_2025_11019_Article_IEq1.gif" Format="GIF" Height="19" Rendition="HTML" Resolution="72" Type="Linedraw" Width="98" /> </InlineMediaObject> <EquationSource Format="TEX">\({\text{A}}_{1\uptheta }^{*}, {\text{A}}_{2\uptheta }^{*},\text{ and}\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mmultiscripts> <mtext>A</mtext> <mrow> <mn>1</mn> <mi mathvariant="normal">θ</mi> </mrow> <mrow> <mrow /> <mo>∗</mo> </mrow> </mmultiscripts> <mo>,</mo> <mmultiscripts> <mtext>A</mtext> <mrow> <mn>2</mn> <mi mathvariant="normal">θ</mi> </mrow> <mrow> <mrow /> <mo>∗</mo> </mrow> </mmultiscripts> <mo>,</mo> <mspace width="0.333333em" /> <mtext>and</mtext> </mrow> </math></EquationSource> </InlineEquation> cube components for base alloy, weak <InlineEquation ID="IEq2"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="10853_2025_11019_Article_IEq2.gif" Format="GIF" Height="19" Rendition="HTML" Resolution="72" Type="Linedraw" Width="46" /> </InlineMediaObject> <EquationSource Format="TEX">\({\text{B}}_{\uptheta },{\overline{\text{B}} }_{\uptheta }\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <msub> <mtext>B</mtext> <mi mathvariant="normal">θ</mi> </msub> <mo>,</mo> <msub> <mover> <mtext>B</mtext> <mo>¯</mo> </mover> <mi mathvariant="normal">θ</mi> </msub> </mrow> </math></EquationSource> </InlineEquation> for Sn-added alloy and strong <InlineEquation ID="IEq3"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="10853_2025_11019_Article_IEq3.gif" Format="GIF" Height="16" Rendition="HTML" Resolution="72" Type="Linedraw" Width="20" /> </InlineMediaObject> <EquationSource Format="TEX">\({\text{C}}_{\uptheta }\)</EquationSource> <EquationSource Format="MATHML"><math> <msub> <mtext>C</mtext> <mi mathvariant="normal">θ</mi> </msub> </math></EquationSource> </InlineEquation> for Ag-added alloy after the first ECAP pass. However, after the second ECAP pass, strong <InlineEquation ID="IEq4"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="10853_2025_11019_Article_IEq2.gif" Format="GIF" Height="19" Rendition="HTML" Resolution="72" Type="Linedraw" Width="46" /> </InlineMediaObject> <EquationSource Format="TEX">\({\text{B}}_{\uptheta },{\overline{\text{B}} }_{\uptheta }\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <msub> <mtext>B</mtext> <mi mathvariant="normal">θ</mi> </msub> <mo>,</mo> <msub> <mover> <mtext>B</mtext> <mo>¯</mo> </mover> <mi mathvariant="normal">θ</mi> </msub> </mrow> </math></EquationSource> </InlineEquation> components for base alloy, moderately strong Cube for Sn-added alloy, and strong <InlineEquation ID="IEq5"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="10853_2025_11019_Article_IEq5.gif" Format="GIF" Height="16" Rendition="HTML" Resolution="72" Type="Linedraw" Width="20" /> </InlineMediaObject> <EquationSource Format="TEX">\({\text{B}}_{\uptheta }\)</EquationSource> <EquationSource Format="MATHML"><math> <msub> <mtext>B</mtext> <mi mathvariant="normal">θ</mi> </msub> </math></EquationSource> </InlineEquation> component in Ag-contained alloy was found.</p> Graphical abstract <p></p>