Weapons don’t have health. They only have a chance to get damaged when you (s)mash things in with them. The same chance might also apply to regular swings but I highly doubt it. Either way, it’s not a pre-set durability kind of thing like in, say, Minecraft.
Protip: Don’t play stable. Do you like missing more than a year’s worth of daily updates? Because that’s how you miss more than a year’s worth of daily updates. The difference between the experimental builds and the stable one is astonishing. Experimentals being “highly buggy” or whatever is an exaggeration.