What are some examples of smart alloys?

Answer:
The most common smart alloys (also known as shape memory alloys) are copper-zinc-aluminum-nickel, copper-aluminum-nickel, and nickel-titanium. Applications include a device to reduce aircraft engine noise, several medical uses, and of course eyeglass frames such as Titaniflex.
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First answer by Maesterseargant. Last edit by Gospodyina. Contributor trust: 196 [recommend contributor recommended]. Question popularity: 27 [recommend question].