SMART MATERIAL In the field of massive and complex manufacturing we are now in need of materials, with properties, that can be manipulated according to our needs. Smart materials are one among those unique materials, which can change its shape or size simply by adding a little bit of heat, or can change from a liquid to a solid almost instantly when near a magnet. These materials include piezoelectric materials, magneto-rheostatic materials, electro-rheostatic materials, and shape memory alloys (SMA’s).  Shape memory alloys (SMA\'s) are metals, which exhibit two very unique properties, pseudo-elasticity (an almost rubber-like flexibility, under-loading), and the shape memory effect (ability to be severely deformed and then return to its original shape simply by heating). The two unique properties described above are made possible through a solid state phase change that is a molecular rearrangement, in which the molecules remain closely packed so that the substance remains a solid. The two phases, which occur in shape memory alloys, are Martensite, and Austenite. In this paper we have made a comparative study between SMA’s and other generally used materials or alloys, and presented simple designs some medical applications of SMA. This also discusses about conventional bone plate used to repair jaw fracture and explain how even a badly fractured face can be reconstructed using bone-plates , the use of SMA’s in the general applications like Robotic gripper and Aircraft maneuverability. Finally, from the comparative study of SMAs and other conventional alloys we have proved that SMAs are superior to them in feasibility, reliability and biocompatibility points of view