Probably it'll blow over in a couple of weeks. The feds next step for things like this is usually to find something they fund and pull funding...probably in this case they could just pull any border funding they give to Texas, and that would be enough for Texas to say "fuck it, we can't buy more razor wire without the funds" and give it up. That's almost always how these things end up.

If not, next step would be to use force, which at worst would result in a minor skirmish at one or two spots between the local forces and the feds. The local forces would lose that fight pretty much immediately. I would guess most of them are all talk and as soon as the feds roll up with tanks and start shooting, they'll give up because they'd rather not die for some stupid border skirmish. The feds may not even have to shoot, what tools do the local forces have to stop an APC from just running over the razor wire? The die hards might stick around and they would die, hard. Perhaps there will be some token fall guy somewhere that spends a long time in jail afterwards, we don't know about him yet because he's not going to be anyone relevant. Nobody that matters will be punished for this in any capacity, just a few local goons will die and some middle manager soldier type will be made an example of.

Either way it ends with Texas and their allied states using this as yet another campaign talking point to show how the fed is doing le government overreach, push their agenda as usual, and the racists will eat it the fuck up forever. There's no way in hell this is anything more than a political stunt, even if it gets a few folks at the border shot by the feds. A small price to pay for the GOP to push their agenda. Sure, their stunts are getting flashier and flashier because they need to, but the GOP doesn't want to balkanize so there's no way it'll go that far.