Is that the stainless version of the Sigg Tourist? Wow, I have not seen one of those for decades. The stainless version is extraordinarily rare.

Quite frankly, I would keep using the stainless setup you have. When I have bike toured with a friend, thus need capacity for two, I used a MSR Alpine two pot cookset that is very similar in size to the Sigg Tourist.

I picked up a titanium two person sized cookset decades ago at a REI Scratch and Dent sale. I have used that on a couple trips for two, but quite frankly it did not reduce the weight much at all when you start adding up everything that you bring. So, I really put minimal value on that amount of lightening on a bike tour. I think the last time I used that was in the photo below, that is the larger of the two pots.