I don't think it would be a plan that would appeal to me.

1) as has been mentioned unless you take a test ride, the material alone will not tell you anything. So you are trading in what sounds like a great Thorn for a pig in a poke. When I have gone to a store to buy a particular bike, it often turns out not to be the bike I leave with. No mater how strong my original theory was. The specifics of a particular model are far more important than any other factor.

2) sounds like you should sell the road bike because you don't use it. Not sure how that translates into selling the Thorn as well. I get the idea that you are looking for middle ground, but having had the best of both worlds that does not sound likely to please.

3) I don't think Ti is a significant change, and can't span the divide you are trying to span. Since Ti does not excel at stiffness it could be a problem on a touring bike where the maker elected to use it's strength to weight ratio to advantage. The fact the frame you are considering includes a carbon fork would seem to indicate that approach and present problems all it's own.