Influence of annealing on NiTi shape memory alloy subjected to severe plastic deformation

► Local canning compression leads to severe plastic deformation of NiTi sample. ► Deformation bands and amorphous bands are observed in NiTi sample subjected to SPD. ► Martensitic transformation is suppressed with decreasing nanocrystalline grain size. ► The precipitates are suppressed due to crystallization of amorphous NiTi phase. ► The precipitates occur more easily in the deformation bands during annealing.