What is Adamantium? Adamantium is a virtually indestructible steel alloy named after the fabled metal Adamantine of Greek mythology. The metal has its origins in the work of American metallurgist Dr. Myron MacLain during World War II when the U.S. government assigned him to military research and development. Through a metallurgic accident, MacLain created the indestructible Vibranium-steel compound that was used to create the shield used by the super-soldier Captain America. MacLain spent decades attempting to duplicate the process, and although unsuccessful, he instead created True Adamantium in the 1960s.

Adamantium is created through the mixing of certain chemical resins whose composition is a u.s. government Secret. For 8 minutes after the resins are mixed the adamantium can be molded into a particular shape as long as it is kept at a temperature of 1500 degrees Fahrenheit. After this brief. The process of creating admantium is complete. The extremely stable molecular structure of adamantium prevents it from being molded further even if the temperature remains high enough to keep it in a liquefied form. Only a device called the molecular rearranger can alter the form of hardened  adamantium.

True Adamantium has proven to be strong enough to absorb a blow from the enhanced hammer of the Asgardian Thor at full power and a sufficient amount would withstand a thermonuclear blast. The only metal strong enough to pierce True Adamantium has been Vibranium.

Adamantium is extraordinary expensive to produce. Certain parties who wish to use admantium on a large-scale have resulted to utilizing a similar but someone weaker compound call secondary adamantium.

The criminal constrictor has special Weaponry made from adamantium. The mutant Wolverine possesses artificial Claws and bones that have been fused with adamantium and yet unexplained manner to increase his tensile strength. The outer  body of Ultron is composed of true adamantium. The armor of the original SIlver Samurai is true adamantium.