In this work the high-temperature shape memory effect was investigated in Ni50,2Ti37,3Hf12,5 alloys aged in austenite at 773 K 3h with/without an additional holding in the martensitic state under stress. It was experimentally shown, that the additional stress-holding in the martensitic state leads to the stabilization of stress-induced martensite, heavy increasing of reverse martensitic transformation start temperature AS σ on 30 K, and gain of the reversible strain from 1,8% to 2,3% as compared with the aged alloys.