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

Nitinol Paperclip: nitinol is a special alloy of nickel and titanium that can be trained to a specific shape at high temperature- in this case the shape of a paperclip. Bend it up at room temperature and it will always snap back into shape when exposed to moderate heat (such as hot tea water). This remarkable property is a type of solid state reversible phase transition known as a martensitic transformation. This sample of nitinol wire came to me in my latest @thecuriositybox which never fails t