The main goal of this short background is to introduce readers to shape memory NiTi materials so that the attributes of the entire family to which they belong can be clearly recognized. We are thinking about the group of the materials whose properties dominate their appearing terminology, for instance, multifunctional material, intelligence, and, ϐinally, smart. All those synonyms are related to the possibility of changing properties through sensing the surrounding environment, actuating by process function of sensor information and in effect, transform one kind of signal to another with multiple amplitude.