Their range topping Aurora frame has a complete carbon seat mast/downtube. So clearly they couldn't make that work quite as well using a titanium tube.

Marketing blurb:-

"A top priority when developing the Aurora was to balance high stiffness and crisp handling with all-day comfort levels that only titanium can deliver. Despite an overall stiffness level approaching our race-specific Reactor model, the Aurora is the smoothest riding frame we offer. A combination of carefully shaped and butted tubing, svelte seat stays and the one-piece carbon seat mast result in a frame that smooths vibration like nothing else on the road."

It's hardly surprising that an artisan company with a long history of titanium fabrication would take this path, but even they have realised that you need carbon to achieve the best result. I would put good money on it that this bike is objectively slower, heavier and no more comfortable than a full carbon alternative. Obviously that would be missing the whole point of a bike like this (art decor piece for the discerning gentleman), but in the cold light of performance this bike is not going to compete against top tier carbon equivalents in any objective way. The use of titanium here is entirely down to aesthetics, nostalgia and of course their company skill set. Let's not pretend that anyone would actually race this in preference to a pro-level carbon frameset.