As far as I understand from reading the patent by Afton Chemical, liquid titanium (Ti) is titanium-dioxide nanoparticles in an organic solvent.
ZDDP and moly (Mo) are excellent, well-proven antiwear, extreme-pressure, and/or friction-modifier (AW/EP/FM) additives. But the problem with them is that they contain phosphorus (P) and sulfur (S), which are catalyst poisons. Especially the P in ZDDP is quite bad for the catalyst if it gets to it. For that reason, phosphorus and sulfur concentration in new oils have been limited and the additive companies are trying to make new additives without P and/or S. Ti is one of the new additives trying to replace the already-excellent ZDPP and moly. Another reason is that moly is a very expensive additive. Note that moly doesn't contain P but only S and you don't need as high a concentration of Mo (200 ppm trinuclear Mo, which results in only 334 ppm S, is about optimal); so, it's much safer than ZDDP on the catalyst.
As I said, ZDDP and moly already excel in wear protection and friction reduction. For this reason, it's hard to fill their shoes. In fact, there is still a minimum ZDDP requirement in GF-5. Can Ti actually be a better additive than moly and replace it? I doubt that but this is not to say that it may still be possible. Most expensive oils use Mo in addition to Ti. Cheap oils like Mobil Super only use Ti, without Mo, as Mo is rather expensive. Mo is one of the most expensive oil additives out there, and, it's another reason why TiO_2 is being used these days -- it's much, much cheaper, being in everything from toothpaste to paint.
I think the best AW/EP/FM additive package is 600 ppm or more P (which makes up ZDDP) combined with 60 ppm or more (ideally 200 ppm) Infineum trinuclear moly. It creates an excellent AW/EP/FM layer on metal surfaces. Does it help if you also throw in some Ti in there? I don't know. But they usually throw in some boron-nitride (BN) compound in addition to ZDDP and moly, boron (B) being another FM; so, throwing in some Ti could also help as well.
Also, it's important to realize that the detergents and dispersants can also make a big difference in AW/EP/FM properties. So, a well-balanced and formulated overall additive package is needed for the best performance.