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中文摘要：
在Gleeble-1500热模拟试验机上进行热压缩试验，研究了变形温度为880～1080℃，应变速率为0．001～10s^-1的Ti53311S钛合金的热变形行为。根据应力应变曲线分析了该合金的热变形行为，计算分析了加工图，并观察了变形后的显微组织。利用加工图结合显微组织确定了热变形的流变失稳区和实验范围内的最佳变形参数。结果表明：Ti53311S钛合金加工过程中温度应控制在相变点以下，应变速率应控制在0．01s^-1以上和10s^-1以下为宜。
英文摘要：
The hot deformation behaviors of Ti53311S alloy at the temperature range of 880-1080℃ and strain rate range of 0.001-10 s^-1 have been studied by using hot compressing testing on a Gleeble-1500 simulator. The maps of hot deformation were calculated and analyzed according to the data of true stress-true strain curves, and the microstructures of deformed specimens were observed. The regions of flow instabilities and optimum hot working condition are can be attained from the deformation maps. The results show that the optimum hot working condition are as follows： the deformation temperature is lower than phase transition temperature, the strain rate higher than 0.01 s^-1 and lower than 10 s^-1.
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