用拉伸试验和应力-应变循环试验研究退火温度(Ta)、变形温度(Td)和应力-应变循环对Ti-49.8Ni-1.0Co(原子分数,%)超弹性合金丝和弹簧变形行为的影响。结果表明:随Ta升高,Ti-Ni-Co合金丝应力-应变曲线上的平台应力升高,平台应变先降低后升高;随Ta和Td升高,合金弹簧的临界切应力升高;随循环次数增加,合金弹簧的应变恢复率降低;预循环训练可增强Ti-49.8Ni-1.0Co合金弹簧的SE稳定性。 The effects of annealing temperature (Ta), deformation temperature (Td) and stress-strain cycling on the deformation behavior of Ti-49.8Ni-1.0Co (atomic fraction,%) superelastic alloy wire and spring were investigated by tensile test and stress- influences. The results show that the stress on the stress-strain curve of Ti-Ni-Co alloy wire increases with the increase of Ta, and the strain of the plate first decreases and then increases. With the increase of Ta and Td, the critical shear stress of the alloy spring increases. As the number of cycles increases, the strain recovery rate of the alloy spring decreases. Pre-circulation training can enhance the SE stability of the Ti-49.8Ni-1.0Co alloy spring.