The following uses for vanadium are gathered from a number of sources as well as from anecdotal comments. I'd be delighted to receive corrections as well as additional referenced uses (please use the feedback mechanism to add uses).
Vanadium metal is important in a number of areas. Its structural strength and neutron cross section properties makes it useful in nuclear applications. The metal is used for producing rust-resistant springs and steels used for making tools. About 80% of the vanadium now produced is used as ferrovanadium or as a steel additive. Vanadium foil is used as a bonding agent in biding titanium to steel
The pentoxide V2O5 is used in ceramics and as a chemical catalyst. Vanadium compounds are used for dyeing and printing fabrics.
A vanadium-gallium mixture is used in producing superconductive magnets.