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The stainless steel body of Tesla's Cybertruck is reportedly leading to issues with gaps in between the panels
(www.businessinsider.com)
This is a most excellent place for technology news and articles.
Nitinol is an alloy of 60% nickel and 40% titanium (usually). It can be used in memory materials or to capture energy from heat. Basically it can be bent when it's below a certain temperature (like a regular metal) and it creates force to restore its shape when it's heated.
Yes, I did learn that by playing modded Factorio. Why do you ask?