Nitinol is a metal alloy of nearly equal portions of nickel (Ni) and titanium (Ti). This alloy has a property called shape memory, which is the ability to undergo deformation at one temperature, then recover its original shape at another. This sample includes 1 foot of nitinol wire.
bend it to any shape. Then heat it ( with hot water or hair dryer) to 98 degrees Fahrenheit and it will return to its original shape. If heated above 950 degrees Fahrenheit, it can be "trained" to a new shape. It will then always return to that shape until it is retrained.