Found this on local site:

Selling Brompton Lightweight S2E-X Titanium Raw.
Weight of the bike 7.xxKG
Spend more than $6K (assuming S$6500 = US$5200)
Selling $4500 (US$3600)

Bike come with :
1)Lightweight Carbon Handlerbar with KCNC grip
2)Ridea Brake lever
3)ALLIGATOR I-LINK Gold Cable Set
4)Chris king Gold headset
5)KCNC lightweight Brakeset
6)Brompton extra lightweight hub with black M14A rims set
7)SLK Carbon crankset with Stronglight 53T Chainring
8)KMC 10Speed Gold chain
9)EZY Quick Release Pedals Ti-Axis
10)NOV Rear Frame Clip,eazy wheels and Carbon Lower Stop Disc
11)Carbon Seatpost
12) All the bolts change to TI

7+ kg (16lbs)? Which parts made the most difference? I'm definitely tempted to steal some of the value-worthy ideas.

Ultimate Folding Bike never went past a single Prototype in the US, https://www.youtube.com/watch?v=uWoeTOVYNY4

Maybe an industrialist in Singapore can get the money to develop the all Titanium Brompton Frame,

the rear and front extremities are already there in the Brompton Options list . and the seat post by 3rd parties , formerly in the factory list.

the steel frame , and handlebar mast and of course the Hinge plates, remain to be tooled up to mass production, in Ti.

ftfy

Depends what type you have now and what changes you've done already. This bike doesn't have fenders;
and I'm going to assume had the reflectors + brackets removed. It only list one brake lever; does that mean
it only has one caliper also?

I've swapped the seatpost and pedals on my S6L-X to titanium parts. Those will be that parts where you'll
be able to save a lot of weight:

https://www.youtube.com/watch?v=Fh5V...aIoDLA&index=4

For some reason, I'd always thought that my Brompton would feel lighter if I had a titanium bottom bracket and crankset.

But since I have an SL6, I'd have to guess that the porkiest component would probably be the 3 speed rear hub, followed by the BB/Crankset.

so?

Jur in the Skunk Works? got a CNC Machine and An argon purged Ti Tig welding rig?
A Mandrel supported Tube bender capable of 3" tube would be handy.

Tbh I actually have thought about it and not dismissed it...

Jur,

I'm glad to hear that :-)
I spoke to Mr. Rubin several times about special Brompton parts he had available (some that I purchased). I also inquired about a Ti UFB frame that he could have made .... for 30(K) ... a bit above my budget ...

I would be in for a Ti Brommy frame with you leading the revolution :-)
Selfishly, it would save me from setting up jigs for a two-off ....