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采用包套锻复合热机械处理技术，在Ti-33Al-3Cr合金中得到了平均名义晶粒尺寸为1μm的热变形显微组织材料在1000—1075℃及10×10－6—8×10－3S－1的应变速率范围内显示良好的超塑性，其应变速率敏感系数高达0．9；热激活能仅为250kJ／mol．在1075℃及8×10－5s－1下得到517％的超塑性拉伸延伸率．获得高的超塑性拉伸值的机理是，动态再结晶导致应变速率硬化
In the Ti-33Al-3Cr alloy, hot deformation microstructure materials with the average nominal grain size of 1μm were obtained at 1000-1075 ℃ and 10 × 10-6-8 × 10- The strain rate of 3S-1 shows good superplasticity with a strain rate sensitivity coefficient up to 0.9 and a heat activation energy of only 250 kJ / mol. A 517% superplastic tensile elongation was obtained at 1075 ° C and 8 x 10-5s-1. The mechanism for obtaining high superplastic extensibility values is that dynamic recrystallization results in strain rate hardening