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AnonTechie writes:

Engineers have produced an alloy that springs back into shape even after it is bent more than 10 million times. "Memory shape alloys" like this have many potential uses, but present incarnations are prone to wearing out. The new material - made from nickel, titanium and copper - shatters previous records and is so resilient it could be useful in artificial heart valves, aircraft components or a new generation of solid-state refrigerators. The work appears in Science Magazine.

Memory alloys are already used in some situations, including surgical operations. A stent, for example, might be squashed into a small space and then spring into its designed shape to prop open a blood vessel. But the alloys have never entirely fulfilled their promise and entered the world of "high cycle fatigue" applications.

http://www.bbc.com/news/science-environment-32886000