NITI shape-memory alloy is an Intelligent material that "remembers" its original shape and that when deformed returns to its pre-deformed shape when heated.This particular phenomenon is called the shape memory effect. Super elastic alloys belong to the larger family of shape-memory alloys. When mechanically loaded, a super elastic alloy deforms reversibly to very high strains (up to 10%) by the creation of a stress-induced phase. When the load is removed, the new phase becomes unstable and the material regains its original shape.NiTi alloys change from austenite to martensite upon cooling.Memory alloy with non-magnetic, wear and corrosion resistance, non-toxic advantages, so the application is very extensive.