Originally Posted by Brompton_X

3/5 of the people I know who purchased the titanium main frame they returned. I know the sample size is very small but still I think that's a very high ratio. Anyway, like I said, you can definitely build one if you want. Just make sure you buy from the right place. I purchased the main frame, rear frame, fork, and stem all together. When I found out I had issues with the fork, and rear frame and tried to replace with Brompton OEM parts, they just didn't work. So right now, I can't fold properly if the chainring I use is bigger than 52T.
I have probably one of the best mechanic in Taiwan built the bike for me. It is just the product issue, not whom built the bike. That's my 2 cents.