That's blast doors of an unspecified metal. If it follows the usual SW materials where such things are specified, they wouldn't be exotic materials, they'd be alloys of standard metals on the real periodic table.

That's why I say that I'm giving the benefit of the doubt to the light saber. They reach plasma temps, which is hot as hell, but wolvie has taken hits from plasma generated by technology and super powers. If it was a sustained thing, maybe; but a fight doesn't allow for sustained contact.

I mean, obviously,, it would depend on who was in charge of the writing decisions. But us nerds have to guesstimate as best we can. In SW universe there are exotics that can resist the sabers both under short and sustained contact. Adamantium is pretty exotic, and is canon about as close to indestructible as it gets.

Light sabers aren't really meant to be unstoppable, they're not an ultimate weapon. They're a high tech, very effective sword that uses coherent energy that generates high heat on contact. There's limits the what they can do.

It's one of those things where sabers have been written to have limits more often than Adamantium has, so I err on that side of things.