What is Iron Man's armor made of?

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Tags

1. #after
2. #weigh
3. #enough
4. #around
5. #called
6. #titanium
7. #sustaining
8. #alloy
9. #nitinol
10. #reactions
11. #damaged
12. #formed
13. #flying
14. #asserts
15. #likely
16. #light
17. #nickel