Tour de France bike tech articles are always a fun read for us. For example, we recently saw a mention of "what appears to be a 3D-printed titanium derailleur hanger by Silca (a component we've seen employed ad nauseam on team bikes)."
We can neither confirm nor deny which teams are using these at the Tour. What we can say is there's a misconception that we made this product just to shave grams (though in most cases, they do). The real benefit of #Silca 3D Printed Titanium Derailleur Hangers is that they improve shifting.
Stock aluminum derailleur hangers can flex up to 4º with today's electronic groupsets. Ours are 2 to 12 times stiffer depending on the bike model and groupset. This provides crisper more precise shifting.
Lastly, before anyone runs to the comments to say "Derailleur hangers are supposed to break so your frame doesn't"— Yes, we know this... That's why they have built-in internal fracture notch in case of a crash. They are also able to be aligned by hand. Not to be snippy, we just see that comment every time we talk about them.