Nitinol is a unique alloy made of nickel and titanium that exhibits one of the most remarkable behaviors in materials science. Its defining feature is shape memory, the ability to be deformed at one temperature and then return to a preset shape when heated. This transformation comes from a reversible shift between two crystal structures known as martensite and austenite. The change occurs with precision and reliability, giving nitinol an almost lifelike response to temperature. Another important

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A Nitinol wire returns to its original, pre-set shape after being heated due to a phenomenon called the shape memory effect. This ability comes from a reversible, temperature-dependent change in the material's atomic structure, not from a simple expansion or melting. | Fadhel Mahdi

NiTiNOL’s shape-memory effect arises from a reversible phase transformation between its austenite and martensite crystal structures. At higher temperatures, in the austenite phase, NiTiNOL maintains a specific shape due to its ordered crystal structure. When cooled below a transition temperature, it transforms into the martensite phase, becoming flexible and deformable. This is where you can bend the wire and deform it into any shape you’d like. Upon heating above the transition temperature (the