The hot tensile deformation of Nitinol 60 shape memory alloy was conducted with Gleeble-3500 thermal simulation machine at 650

850 ℃ and 0. 01

1 s

-1

. The processing maps were constructed and hot working parameters were optimized based on the generated processing map. The results show that there exists a single unstable region at 650

776 ℃ 、0. 075

1 s

-1

associated with flow localization in the processing map. The optimized hot working conditions correspond to 690

750 ℃ 、0. 01

0. 026 4 s

-1

with peak efficiency of 0. 35 at 720℃ 、0. 01 s

-1

and 750

838 ℃、0. 01

0. 050 5 s

-1

with peak efficiency of 0. 38 at 810 ℃ 、0. 01 s

-1

. microstructural observation indicates that the main deformation mechanism of optimized domains is characterized by dynamic recrystallization.