The isothermal constant strain rate compression test of Ti-2.7Cu alloy was carried out by Gleeble-3500 thermomechanical simulator. The hot deformation behavior at temperature of 740–890 °C and strain rate of 0.001–10 s⁻¹ was studied. The results show that the flow stress of the alloy is more sensitive to the deformation temperature and strain rate. The flow stress will decrease with the increase of deformation temperature, and increase with the increase of strain rate. The constitutive equation of Ti-2.7Cu is derived by using the Arrhenius hyperbolic sine function, and the activation energy at a strain of 0.4 is 412.32 kJ/mol. Based on the experimental data, the power dissipation efficiency and the instability parameter were investigated. Processing maps were established by superimposing the instability map and the power dissipation map. Through processing map prediction and microstructure observation, the unstable zones are mainly flow localization (740–750 °C /0.56 s⁻¹–10 s⁻¹) and mechanical instability (825 °C–890 °C /0.32 s⁻¹–10 s⁻¹), and the deformation mechanism of the stable zone is mainly dynamic recrystallization. It is found that the suitable deformation parameters of Ti-2.7Cu alloy are as follows: deformation temperature 780 °C–825 °C, strain rate 0.001 s⁻¹–0.056 s⁻¹.

用Gleeble-3500热力机械模拟器进行了Ti-2.7Cu合金的等温恒应变率压缩试验。温度为740–890°C，应变率为0.001–10 s ^-1时的热变形行为被研究了。结果表明，合金的流动应力对变形温度和应变速率更为敏感。流变应力将随着变形温度的升高而减小，并随着应变率的升高而增大。利用Arrhenius双曲正弦函数推导了Ti-2.7Cu的本构方程，应变为0.4时的活化能为412.32 kJ / mol。根据实验数据，研究了功耗效率和不稳定性参数。通过叠加不稳定性图和功耗图来建立处理图。通过加工图预测和显微组织观察，不稳定区域主要是流动局部化（740–750°C /0.56 s ^-1 –10 s ^-1）和机械不稳定性（825°C–890°C /0.32 s ^-1 -10 s ^-1），稳定区的变形机理主要是动态再结晶。发现合适的Ti-2.7Cu合金变形参数如下：变形温度780°C–825°C，应变速率0.001 s ^-1 -0.056 s ^-1。