It depends on how the frame has been made, as to how it’ll ride. I’ve had ti frames that were comfy, supple, springy, great on towpaths etc. (e.g. Airborne Carpe Diem) but equally I’ve ridden ti frames that were much stiffer than this, and basically only fit for Majorcan roads.
The suitability of these frames (to ‘gravel’ riding – a questionable term) comes down how they’ve been put together.
re. the Gradient, my assessment is that it’s between a road bike and a gravel bike, in terms of ride and if you want to do a lot of towpaths then there a ‘softer’ candidates. Furthermore, the std fork is definitely too stiff for offroading, and it’s something I’m going to change when I have the time/cash. It’s basically a road fork.