License to Carry a Handgun or LTC. It was previously Concealed Handgun License but the Legislature struck the word "Concealed" from the law as part of the legalization of open carry, then switched the other words around.
There are still a lot of references to a TX CHL online, including the TX CHL Forum; I suspect it will take some folks years to switch everything over and rewire their brains to the new terminology. (I don't follow the TX CHL Forum closely enough to know whether a name change is proposed.)