It's not as hot as you'd think. Solar panels (highly absorbing) reach slightly over the boiling point of water in direct sunlight. Metals work fine, so do a surprising number of composites and plastics.

* Aluminum, Magnesium, Titanium, Berylium

* Graphite/epoxy, Aramid/epoxy, Glass/epoxy

https://www.sciencedirect.com/topics/earth-and-planetary-sci...