Ti 6AL 4V ELI is Titanium that has been alloyed with 6% aluminum and 4% vanadium with extra low interstitial. Titanium is a reactive metal and can be anodized to several colors. Metal Mafia offers a lifetime guarantee on the workmanship of all its ASTMF-136 titanium. If there is any defect caused by manufacturing, please contact Metal Mafia at any time, and we will gladly replace your piece once we receive the original broken piece back. Any custom anodized piece is considered final sale unless the piece is defected caused by manufacturing. All Titanium is fully autoclavable. Do not use harsh chemicals on any jewelry.