-1），來研究應變和應變率對鈦合金冷變形中微觀組織演變的影響。結果表明，較大的真應變和較高的應變率容易使材料內(nèi)部產(chǎn)生局部晶粒粗化和絕熱剪切帶。真應變應選擇在0.2~0.6的范圍內(nèi)。1.0 s-1的應變速率下，組織均勻且晶粒細小，適合冷變形。在冷變形過程中觀察到的變形軟化主要是由在較大的真應變和應變速率下產(chǎn)生的絕熱溫升和局部晶粒粗化引起的。;To understand the deformation mechanism and microstructure evolution of TC16 titanium alloy during cold heading, cold compression tests were conducted using a Gleeble 3800 thermo-mechanical simulator. The effects of strains (0.2, 0.4, 0.6, 0.8 and 1.0) and strain rates (0.1, 1.0 and 10.0 s-1) on the deformation behavior and microstructure evolution of the alloys were investigated. Results show that larger true strain and higher strain rate are prone to cause local grain coarsening and adiabatic shear bands within the material. True strain should be selected in the range from 0.2 to 0.6. Uniform structure and fine grains that are suitable for cold forming can be achieved at a strain rate of 1.0 s-1. The deformation softening observed during cold deformation is caused mainly by adiabatic temperature rise and local grain coarsening at larger true strains and higher strain rates."/>