Tungsten, or tungsten carbide, is a metal that has become a popular choice as a material for men's wedding rings. Tungsten is probably the strongest metal used for a ring. It ranks extremely high on the Moh's Scale of Hardness, ranking higher than pretty every other metal and right below the diamond. It's an incredibly tough metal, resistant to scratches, hypoallergenic, and it never loses its shine.
The biggest reason for its increased usage is its affordability. Tungsten is probably the go-to metal when it comes to affordability. It's easy to produce and is also in high demand. The price of gold, at the time of writing this, is over $1,500 per ounce. Silver is $26 per ounce, and platinum is $1100 per ounce. Tungsten is around $8 per ounce.
This material does come with downsides, though. Since it is extremely hard and scratch-resistant, it is inversely crack-resistant. That doesn't mean it will crack very easily, but tungsten can crack if met with an extreme amount of force. You also can't resize a tungsten ring and should make sure you know your size before committing to a tungsten ring.