Let me preface this to say that I have NO EXPERIENCE with titanium rods.
What I do know, however, is that pound for pound, titanium is hard to beat for strength. With that said, it is notable to recognize that a lot of popular titanium alloys do not have as good of a fatigue life as high-chrome steel alloys such as those used in hi-perf steel rods.
For a sprint motor, titanium can offer a lot in terms of balancing strength against reciprocating weight and its associated loading cycles. For an endurance motor, I am not sure of whether a connecting rod is the best application.
Remember, I have ZERO experience with Ti rods, so I am only offering something for you to discuss with your builder/parts suppliers.
** Hopefully, this thread can bring positive information to us all.