Depending on the continuity, the shield tends to be made out of either vibranium or a vibranium-adamantium alloy. The movie continuity doesn't have adamantium, since that primarily belongs to the X-Men brand (which is licensed to Fox).Alar said:Eh? I thought his shield was made out of adamantium, the same stuff Wolverine's claws and bone-armor is made out of.JediMB said:That was the vibranium shield, actually. It took the force of Thor's strike and dispersed it. Hence the shockwave.Alar said:He's probably even made of tougher stuff in general, considering his arms didn't shatter when Thor smacked his shield
EDIT: Okay, apparently the information regarding the shield sometimes being made a vibranium-adamantium alloy is false. It is normally made from vibranium (and steel), but at one point Rogers went under the identity of "The Captain" and had an adamantium shield. Also, Ultimate Cap has an adamantium shield, but I'm fairly certain he compensates by simply being stronger on that continuity.