Everything you need to know about Brompton tig-welded titanium frames.
All Brompton titanium framesets start their life as a set of tubes in our specialist TIG welding factory in Sheffield, 300 km north of our London Factory.
We built this dedicated space as titanium requires different skills, machinery, and process than steel. The city of Sheffield has a rich history and legacy of expertise in metalworking.
TIG Welding requires a high level of skill and coordination between hand, foot and eye. Even the most experienced welders need time and intense focus.
As the pieces start to melt, the welders introduce a commercially pure titanium wire rod to the mix. A molten pool of titanium is created. Once cooled, it forms a strong bond.
The skill of the welder here is to perfectly balance the pool of molten filler with the heat of the torch and the pace or motion of their hand.
When you heat titanium to high temperatures, it chemically reacts with the oxygen and nitrogen in the air, compromising the strength of the weld. To get around this problem, we create an inert gas environment around the weld pool.
Inert gases, Argon, in this case, don't react under high heat – so you get a strong, clean weld as intended.
The beauty of the weld
TIG welded titanium joints have a silvery bead; at times, it almost appears to have a mirror finish. Every TIG welder has a signature style making each weld unique. Their beauty is appreciated outside of engineering, with artists often choosing them for sculpture welding.