Ti Alpine – heart says maybe, head (and bank account) says no. Only real benefit to Ti would be the lighter weight (and not having to clean it) because it would be burlier than other Ti frames, so it wouldn’t necessarily ride any differently to the steel version. It would just be lighter.
EBB Alpine – yes, 2 exist. No plans at present to produce unless at least 20 people say they want a long travel singlespeedable frame. A lot easier to produce than a Ti version as the drawings are already done and samples are already made and tested.