The hardest metal in the universe is kentchin, it can only be located in areas of supernovas
Kentchin is a Vizier in the game Summoners War and is known for being a strong unit with crowd control abilities. He has a passive skill that can silence enemies, making him useful in controlling the battle. Overall, he is considered to be a powerful unit in various PvP and PvE scenarios.
They are silvery and hard like all transition metals
Titanium is a very strong and light metal and is used in aircraft, naval ships, spacecraft, armor plating and missiles. It can withstand even extreme temperatures and has excellent corrosion resistance. The cons is the it is very expensive.