Best ring for blue collar worker

My FH is a railroad conductor and often times is wrist deep in train oil/grease. He also has to constantly jump up and down off the train cars, which would mean constant banging of the ring. We got him a fancy ring (white gold) that he can wear on nice occasions, holidays, anniversaries, etc. He also has a titanium one (black), but idk if that one is okay to wear to work. However, I am wondering what brand/type would be best for someone that works with their hands and gets super dirty. I was thinking silicone?? If your spouse/future spouse works with their hands, what ring did you buy or plan to buy? I'm open to any and all suggestions. Price doesn't necessarily matter right now since we are just looking.