Ti blades are great at cutting coarse materials, but they are not good at making a fine edge or trying to work with something like wood when compared to other steel.
They certainly do have their place, especially when someone needs a blade that can be entirely corrosion resistant, non-magnetic, and still hold an edge better than H-1.
The issue with them generally is that they are more difficult to produce, and while the carbidized edge has pretty good wear resistance, the titanium itself is not very wear-resistant. Titanium does have a lot of flexibility in it though, so it is very hard to have a blade break or deform on you, though you're not going to be hacking at anything with a titanium edge I'm pretty sure.
Beta Titanium blades are another interesting alloy that is used, but I have a fairly limited amount of knowledge about that material right now since it is used sparingly in knives to my knowledge.
SM-100 is a good overall material in smaller knives, because it will hold an edge for an insane amount of time while still being "corrosion-proof" and retaining the flexible and tough nature of titanium, but the reason we don't see it used in knives hardly at all and it costs such a premium is because it is only produced for the military, and is extremely hard to produce. The amount of it that knife makers have been able to get is usually surplus that was produced for a military contract and then sold out to third-parties when the material wasn't bought by the military.
It will probably not be one of those materials that makes it into the domestic market quickly, if it does at all, considering the time-intensive process required to make it and the extremely specialized nature of the material itself, not to mention the difficulty involved with producing blades from it.
I think, if you are going to have a titanium blade, then stick with regular titanium with a carbidized edge, because it has been done for a long time for a reason, and it is a tried and true method, at least until we know more about these other alloys and they become more prevalent. Right now, the information on them is pretty lacking since they are so few and far between.
