The 'we' is the Worlds Edition - nothing to do with the Worlds - just an excuse to put every option part on one car with no regard to performance
I think it uses the same screws as the TRF511 - not the best screws ever but better than the original 501X screws.
I think 'Tony Screws' do a kit for the 501X - their screws are the best Steel ones you can get.
Titanium screws are a bit lighter but I'm not sure they're any stronger and certainly you'd not use them to mount the upper shocks as the'd just break.
My 501X has titanium screws and alloy for some non-structural parts - and steel for the shock mounting. I got my Titanium screws individually bagged like 10 to a bag or something - I think they were cheap Yeah Racing screws.