Question: What material is captain america's shield made out of?
Disambiguated questions and answers: question: What material is Captain Americas shield made out of mostly?
What are all the materials Captain America's shield  ismade out of?
answer: Vibranium
Vibranium-steel alloy
Steel
Vibranium, steel alloy, and an unknown catalyst
Natural Questions answer: vibranium (from the Wikipedia article "Captain America's shield")