Bruce Gordon built a lugged all-ti frame which apparently is epoxied together.

http://brucegordoncycles.blogspot.co...r-kitchen.html

It's a show bike and a ton of work went into making it visually stunning, but if I were paying someone to build me a frame that's not the construction technique I would want. Plus fabricating the lugged bits would take an insane amount of time (and therefore expense).

OP - are you sure you don't mean Bocama lugs? NOS sets pop up on ebay from time to time. Any skilled builder would be able to reshape a chunkier modern lug set into something shapelier.

Just go all steel. Modern steel is very good, and while maybe not ti-light the money you save will be significant enough to allow you to lighten your bike in other places.