I was so close to a custom Triton from Russia, before I got my Open, but before that I checked out the Waltlys in China, seemed very cheap. http://www.waltlytitanium.com/
A super fast guy in my rando club got a custom ti nuevo rando frame and a second custom ti coupled tandem frame made in China last year, by two different manufacturers. Both are really nice and compare well with the work of various pnw artisanal shops that also made this guy frames in the past.
When I was in Xian at the Ti factories I rode a different folder and it was soooo flexxxxxy. You could twist the bars and seat at least a foot out of plane.