Shape-Memory Alloys are a special class of metals that possess the unique ability to remember their original shape and return to it after being deformed. They are made of a combination of two or more metals, usually a transition metal and a metal alloy, and exhibit a wide variety of properties, including the ability to "remember" their original shape, even after being subjected to extreme temperatures or physical pressure. Shape-Memory Alloys have a variety of practical applications, including use in biomedical and aerospace applications.