Its interesting that all this posting about Ti bikes comes at a time that I'm looking into a custom Ti/Carbon frame. This is going to offend many C&V members because it is anything but classic or vintage. But I think it fits in this thread. So here is the story.
I've seen a lot of Holland custom frames around where I ride (Bill Holland's shop is just 4-5 miles from my home) and recently decided that I'd stop in and see what all the fuss is about. After several conversations and brief fitting he sent me home with this bike as a demo. Its Bill's personal bike, and I've had it this weekend (unfortunately it rained everyday since I picked it up) and I'll take it back the middle of next week.

Sorry for the crummy lighting....I'm hiding it in the guest bedroom so my wife doesn't see it because I already have too many bikes.

You can see some of the detail here.

The "Holland" and diamonds is laser cut out of the butted Ti tubing. After the cutting evidently carbon is rolled and slid inside the tubing before being treated/heated and "fused" to the titanium.

Here is the Headtube and Di2 shifters.

Rear triangle. I like the beefy chainstays.

I thought this was interesting, the frame can be disassembled for travel/shipping, there is another sleeved release above the bottom bracket on the down tube here.

All in all the bike is a beautiful piece of art/work. As soon as I've had a chance to ride it, I'll see how it compares to my full Ti framed roadbike. Supposedly the Ti and carbon combination dampens more of the road vibrations, while still not feeling "wooden" like a full carbon frame.
CMC