1. Adamantium. 2. Vibranium. 3. Captain America's Shield. Adamantium & Captain America's Shield are man made; while Vibranium is natural. As far as durability goes CA's Shield > Adamantium > Vibranium. Vibranium is not, or ever was, stronger than Adamantium. However Vibranium have this unique property that can absorb pretty much anything. Lets put it this way, if a normal human was put in a suit made of vibranium and the Hulk/Sentry punched you; you probably still survive because the metal absorb all the energy that would of transfer upon you; however the suit may have dents or imperfections. If you were in a suit made of adamantium, you would be pulp, but the suit would most likely be in pristine condition. As for Captain America's shield, there is NOTHING in the Marvel Universes thats like it. It is unique and probably forever be this way. kthx. Just tired of so many people not knowing the difference.