Forged By Fate
During World War II, American metallurgist Dr. Myron MacLain accidentally creates an indestructible Vibranium-steel compound. Eventually this compound is used to become the most famous symbol of Super-Soldier Steve Rogers—Captain America's shield. Dubbed Proto-Adamantium, this version of the unbreakable steel alloy is impossible to reproduce. However, other versions, including True Adamantium, Secondary Adamantium and Adamantium Beta are created through years of testing and research.
Given the metal's incredible strength and durability, many individuals want to use Adamantium for their own purposes, both good and evil. Villains like Ultron, Romulus, Silas Burr, AKA Cyber and Frank Payne, AKA Constrictor, benefit from its unique nature. On the other side, many versions of Captain America wield the shield and some of its ilk. Tony Stark, AKA Iron Man, figures out how to manipulate the metal and James Howlett/Logan, AKA Wolverine, continues to be the best he is at what he does in part because of the Adamantium bonded to his bones and those iconic claws.
A Discovery for the Ages
The United States government employs metallurgist Dr. Myron MacLain experiments with several different kinds of steel alloys as well as a then-unidentified substance now known as Wakandan Vibranium during the early 1940s. During one of his tests, he falls asleep only to awaken to find the two metals bonded! He quickly pours the molten substance into a disc-shaped mold for optimal testing, but he can never repeat the process.