Beskar AKA Mandalorian Iron is lightsaber resistant and, if processed correctly, can be light enough to wield on the end of a stick while still being an effective weapon.
Well, building something into the lore post 4/5/6 and confabulating an awkward explanation does not make it rigorous or logical. Midachlorians anyone? If lightsabre hilts were able to be made from such metal, why are they continually severed by single strikes in the movies?
But the inelegant contrived lore is a side issue really. Axes and Jedis? It's a complete dilution of the fantasy. You guys are undermining your own universe.