You have to accumulate enough points to earn the title, then it will be automatically awarded to the horse.  You can only earn halter title points by participating in halter shows which horses can only do if they are either purebred or a crossbreed from an active or completed crossbreed campaign.  Generic crossbreeds (who will say “crossbreed” as their breed) cannot halter show so do not have the opportunity to earn halter title points towards a title.

https://horsefable.wiki/halter-arena/ You can read more here