back in the day, I read (in BMXPlus?) about an all titanium race bike.
might be this one.
it does have titanium hubs and pedals, but whether it is all titanium I couldn't find out.
set up for indoor racing with sew-up tyres on tubular rims.
I remember seeing a pic of the team rider who must have been about 7 y.o. holding the bike easily above his head. wish I could remember the weight, it was way less than anything else at the time, even the aluminium framed bikes.
About 5kg maybe?
from bmxteacher again.
PS - the pre-mtb riser bars are interesting. hadn't noticed them before.