The influence of annealing temperature（400

6

00 ℃）on two-way shape memory effects in NiTiCu shape memory alloy（SMA）with the thermomechanical training and the thermal cycling has been investigated.The results show that the maximum two-way shape memory strain of 4.2% occurs in the aging temperature of 500 ℃ after 100 thermomechanical trainings.During 2000 thermal cycling

the two-way shape memory strain is faded rapidly with increasing in thermal cycling in initial 100 thermal cycling while it is faded slightly towards a stable value with more than 100 thermal cycling.The Ms

Mf

As

Af values are raised with the increases of aging temperature before thermal cycling

however As

Af values are decreased slightly with the aging temperature more than 550 ℃

while after thermal cycling

the Ms

Mf critical values and As

Af critical values can be observed at aging temperature of 550 ℃ and 500 ℃ respectively.The transformation temperature would be shifted after thermal cycling with the same annealing temperature.