NiTi, short for Nickel-Titanium, is a metal alloy known for its unique properties, particularly its shape memory and superelasticity. This means that it can return to a predetermined shape when heated above a certain temperature, making it useful in various applications, including medical devices and robotics. The alloy is commonly used in orthodontics for braces, as it can exert a consistent force on teeth while being flexible. Additionally, NiTi is employed in aerospace and automotive industries for components that require durability and resilience under stress.