Titanium is the greatest material for a bicycle and Bombtrack clearly knows that which is why they took their Hook EXT and made it from titanium for 2021. The Hook can take 650b or 700 wheels, has plenty of bosses for cargo attachments, and is only available as a frameset.

Specs:
-Titanium 3Al-2.5V frame with T47 BB shell fender mounts and through axles.
-Full carbon tapered fork with internal light cable routing, through axles and triple cage mounts.
-Sram UDH derailleur hanger.
-Toptube bag direct mounts, triple cage mount on downtube and seattube for optimized bottle position, bottle cage mounts underneath the downtube and rear rack mounts.
-CNC yoke for maximum tire and chainring clearance.
-Ovalized toptube for supreme steering precision and comfort.
-Biaxially ovalized downtube for optimized power transfer and steering precision.
-Front derailleur compatible.
-12 mm through axles front and rear.