Nickel Titanium (also known as Nitinol or NiTi) is in the unique class of shape memory alloys. A thermoelastic martensitic phase transformation in the material is responsible for its extraordinary properties. Nitinol alloys are typically made of 55%-56% Nickel and 44%-45% Titanium. Small changes in composition can significantly impact the properties of the material. There are two primary categories of Nitinol.

Nickel-Titanium alloy, commonly known as Nitinol, is a high-performance material characterized by its unique thermoelastic martensitic phase transformation. This property enables both a shape-memory effect and superelasticity, allowing the alloy to return to a preset shape when heated or recover its original form after considerable deformation. These adaptive mechanical behaviors make Nitinol ideal for precision applications. The alloy typically consists of 55-56% nickel and 44-45% titanium, and even minor compositional adjustments can significantly impact its performance.