I lived through a catastrophic fork failure. (Barely) Now I am rather picky about what forks I will ride. I choose to ride only steel forks with brazed crowns. If you do not push the materials and weight, very forgiving of even rather poor workmanship. I will never run aluminum again anywhere on a fork again. Now if my builder gets his hands on the right tapered tube to make a sweet ti fork, I'm in. These would be his welds and he had been doing them for 30 years.

Edit: I love the ride of steel forks on ti bikes. The Merlin I rode almost 20 years ago had "the ride". I had TiCycles build my custom with a steel fork. Rode it yesterday. After 10 years, still love that ride. My 2nd ti custom and another steel fork.

To me. a steel fork on a ti bike makes sense from a ride standpoint. It is the titanium tubing that makes those bikes come alive. Now all of those tubes are in some variation of beam bending or torsion with both ends supported, at least to a degree. Forks are different. They behave much closer to a pure cantilever. To bring response frequency up to the order of the rest of the tubes, making that fork from a material that is roughly twice the bending modulus (ie twice as stiff) makes sense, at least to my both mind and observation.

Ben