本文较全面的介绍了一种650～700℃短时使用的新型高温高强钛合金BTi-6431S的组织和性能,包括该合金的室温拉伸和高温拉伸、短时蠕变和短时持久及显微组织。试验数据表明:该合金棒材、板材具有较高的室温强度和室温塑性,特别是在650～700℃显示出比现有常规高温钛合金更高的高温强度以及大载荷持久和蠕变的良好匹配,可用于650～700℃温度短时使用的宇航结构件。 This paper introduces the microstructure and properties of BTi-6431S, a new type of high-temperature and high-strength titanium alloy for short-term use at 650-700 ℃, including the tensile and high temperature tensile tests, short-term creep, short-term and long- Microstructure. The experimental data show that the alloy bar and plate have higher room temperature strength and room temperature plasticity, especially at 650-700 ℃, showing higher high temperature strength and long-term loading and creep at high load than conventional high temperature titanium alloy Matching, can be used for short-term temperature of 650 ~ 700 ℃ aerospace structure.