A few years ago, Brompton invested in a computer controlled brazing station, and twasn't cheap - around $2M USD if memory serves. Brompton had found that their skilled brazers still weren't getting the consistency that resulted in the nth degree of precision. Big upfront expense but a long term investment from a different perspective.

Now take that process - computer controlled brazing - and extrapolate that to a ti welding setup. It wouldn't be so bad if you didn't have to back purge inert gases, but if you don't, you get contaminated welds which will eventually fail. I can only imagine the complexity that goes into a setup like this.