To synergistically improve the strength-ductility of copper alloys used in the miniaturized component, Cu-3.2Ti-0.2Fe-0.2V alloy with heterogeneous structure was obtained by thermo-mechanical treatment (namely, short-time annealing). The heterogeneous structure was composed of the non-uniform grains formed due to Laves phase inhibiting grain growth and FCC structured Cu₄Ti phase with good coherent interface precipitated on the grain boundaries in sub-micro size. After aging at 400 °C for 2 h and then 450 °C for 4 h, the ultimate tensile strength and elongation of the heterogeneous-structured alloy were 976.8 MPa and 18.8% respectively, which was approximately 120 MPa more than that of the coarse-grained alloy after complete annealing, but both alloys had comparable ductility. When cold-rolling with 5% reduction was carried out before the aging of 450 °C, the strength increased to 1057 MPa and corresponding elongation was still over 10%. The strengthening mechanism of alloy with heterogeneous structure was analyzed and the hetero-deformation induced hardening of 284.5 MPa was the other significant reinforcement. The semi in-situ observation of tensile deformation behavior shown that the superior ductility in coarse-grained alloy was mainly attributed to the slipping and twinning. While grain rotation and grain boundary sliding were additional deformation mechanism in heterogeneous-structured alloy during tensile deformation, meanwhile, the texture of S, {110}<1 $\bar{1}$ 1> and {331}<1$\bar{2}$ 3> components converted to the texture of {441}<$\bar{1}\bar{1}$ 8>, Goss, Copper and {012}<$8\bar{2}1$ > components. The deteriorative ductility after rolling with the reduction of 5% was owing to the S and Cube components converted to the strong texture of {032}<22$\bar{3}$> components.

为协同提高小型化部件所用铜合金的强塑性，采用热机械处理（即短时间退火）制备了异质结构的Cu-3.2Ti-0.2Fe-0.2V合金。异质结构由由于 Laves 相抑制晶粒生长而形成的不均匀晶粒和 FCC 结构的 Cu _4组成具有良好共格界面的Ti相以亚微米尺寸在晶界上析出。在 400 ℃时效 2 h 和 450 ℃ 4 h 后，异质结构合金的极限抗拉强度和延伸率分别为 976.8 MPa 和 18.8%，比粗合金高出约 120 MPa。完全退火后的晶粒合金，但两种合金具有相当的延展性。在450 ℃时效前进行5%压下量的冷轧时，强度提高到1057 MPa，相应的延伸率仍在10%以上。分析了异质结构合金的强化机理，284.5 MPa的异质变形诱发硬化是另一个显着的强化。拉伸变形行为的半原位观察表明，粗晶合金优异的延展性主要归因于滑移和孪晶。而晶粒旋转和晶界滑动是异质结构合金在拉伸变形过程中的附加变形机制，同时，S的织构，{110}<1$\bar{1}$ 1> 和 {331}<1$\bar{2}$ 3> 组件转换为 {441}<$\bar{1}\bar{1}$ 8>、高斯、铜和{012}<$8\bar{2}1$> 组件。轧制后延展性下降 5% 是由于 S 和 Cube 组分转化为 {032}<22 的强织构$\bar{3}$> 组件。