SURGICAL STEEL 316L
Surgical stainless steel is a common metal used for body jewellery. It is widely avaliable and affordable.
TITANIUM 
Titanium, one of the best materials when making body jewelry. This because titanium offers a few very practical advantages. First off, titanium is fully free of nickel making it perfectly suitable for those with a nickel allergy. On top of that, titanium is 3 times as strong as steel. Changes are few to slim that you'll bend this one or get it scratched. 
Another important feature is that titanium doesn't rust, you can expose this piercing to fluids as much as you like.