<p>The high-strength, high electrical conductivity and high softening temperature Cu-0.3wt.%Al₂O₃ dispersion-strengthened copper alloy was fabricated by composite plastic deformation technologies including hot extrusion and rotary swaging in this study. The mechanical properties and microstructural evolution of the alloys are studied in various RS passes. The microstructure was analyzed using electron back-scatter diffraction and transmission electron microscopy. Additionally, the tensile strength, electrical conductivity and softening temperature of the samples were determined. The results indicate that as the RS strain increases, a majority of the grains reorient paralleling the RS orientation, resulting in the appearance of five typical textures of FCC metal in the alloy. The alloy has stable features during high-temperature annealing, with the softening temperature remaining above 800&#xa0;°C after a strain of 3.35. The electrical conductivity shows a general decreasing trend during the RS strain increase, but the final conductivity of the samples remains above 80% IACS. Moreover, tensile tests show that RS substantially improves the mechanical characteristics of the studied alloy rods. The ultimate tensile strength of the sample is 458&#xa0;MPa at a strain of 3.35. The increase in the strength of as-swaged alloys is predominantly due to the cooperative influence of dislocations, grain refinement and the interactions between the Al₂O₃ particles and the matrix.</p>