Vanadium facts in Son's Periodic table book13 Jul 2020 17:46
some may already know this, but either way I found it fascinating:
Damascus steel:- When the Crusaders took up arms against the Saracens 1,000 years ago, they found their huge, heavy broadswords were no match for the curved sabers of the defenders. The swords and armour were made from Damascus steel. Small amounts of Vanadium made this alloy very hard so it stayed sharp, in later Crusades, European soldiers used similar weapons.
Fusion reactors: Vanadium is being used in toroidal fusion reactors, the metal is being used because it does not expand or wrap much , even when very hot.
Fascinating :-)