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It is pretty fascinating! I first learned about them by watching a local TV educational Japanese science program (early 2000s, but the videos were older, ~90s). They even mentioned about using them on car’s exteriors. If you had a car accident, you would just add hot water to fix it.

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> If you had a car accident, you would just add hot water to fix it.

This is pretty much the pitch for shape memory alloys for making frames for glasses. Bent frames? Just heat them with a blow drier to get them back to shape again. Or use that bath of heated glass beads as they seem to like doing at Lens Crafters.

It would have saved my parents boatloads of money if that existed back when I was a schoolboy.

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