Something to think about is the type of sheath. I have some nice axes in leather sheaths. I usually stored them away from the sheaths, but I moved to a new home in 2019, got caught up in some post move construction, and months later, by the time I unpacked the axes several of them had rusted from the leather contact.

They were stored in our house basement which definitely not humid (our sump pump has never run in the 7 years since we had it built, as predicted by the soil expert associated with our septic system build).

I'd much prefer a kydex (or plastic) sheath, but for some reason those are not very common.