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本文利用拉伸试验系统地研究了冷变形量、热处理工艺对Ti-49.8％（原子分数）Ni合金非线性超弹性的影响。研究表明，不同冷变形量丝材经723K，0．5h退火处理后，冷变形量较大的丝材（大于20％）经一定次数的应力─应变循环处理后，可获得完全的非线性超弹性，而冷变形量较小的丝材，即使经过多次应力─应变循环处理也难以获得完全的非线性超弹性。经同一温度退火处理的不同冷变形量丝材，冷变形量越大，获得完全非线性超弹性的温度区间越宽，在相同拉伸温度下，其完全非线性超弹性应变量也越大。同一冷拔量的丝村经不同温度退火处理后，退火温度越高，获得完全非线性超弹性的温度区间越窄，完全非线性超外性应变量也越小。
In this paper, the effects of cold deformation and heat treatment on the nonlinear hyperelasticity of Ti-49.8% (atomic fraction) Ni alloy were systematically studied by means of tensile test. The results show that after annealed at 723K for 0.5h, the wire with cold deformation larger than 20% can be completely non-linear superconducting after a certain number of stress-strain cycles Elastic, and cold deformation of the wire smaller, even after repeated stress - strain cycle treatment is also difficult to obtain complete nonlinear super-elastic. For cold-deformed wire with the same annealing temperature, the larger the cold deformation, the wider the temperature range for obtaining complete nonlinear hyperelasticity, and the greater the total nonlinear super-elastic strain at the same stretching temperature. After annealing at different temperatures for the same cold drawing silk village, the higher the annealing temperature, the narrower the temperature range for obtaining complete nonlinear hyperelasticity, and the smaller the total nonlinear extra-elastic strain.