Shape memory alloys (SMAs) are novel materials that show specific phenomena known as super elasticity (SE) and shape memory effect (SME). The specific behavior of SMA’s recovery to the original shape by heating or unloading is based on the presence of a reversible crystallographic austenite–martensite transformation. Several alloying systems show the shape memory and super-elastic effects: copper-based SMAs, alloys made of nickel and titanium (Nitinol/Titanol) and Fe-based SMAs. The properties of SMAs are influenced by various factors, such as the temperature, chemical composition, crystal structure (polycrystal or monocrystal) and orientation, grain size, the presence of precipitate phase, heat treatment, etc. Shape memory alloys have been extensively studied and are available in many applications, such as eyeglass frames, orthodontic wires and coronary stents. Besides medical applications, SMAs may nowadays be found in automotive applications, aeronautical applications, architecture and many other fields.

This issue coveres the classification, shape memory properties, production techniques and SMAs modifications, as well as their usage in the advanced devices for technical and medical applications. The special issue will look at SMA development in which there is much to explore and can offer great advantages in mechanical engineering, robotics and medicine.