If I understand correctly, the Titans were made by Tanfoglio in Italy until 1968, and after that were assembled in the US from imported parts. I think some had a steel frame and slide, while some had an aluminum frame and steel slide. I think that a company called EXCAM may have manufactured or imported them as well.
I believe that one version of the Titan had a 27 in the model number.
I have no first-hand knowledge, but I did a little reading and it sounds like maybe there were earlier all-steel ones from Italy that some people describe as being decent guns. It sounds like the US-assembled and/or aluminum-framed models were a lot more iffy.
I appreciate BD for setting me straight. I have never owned a 25 and have toyed with the idea of getting a Titan just for grins. After reading up on it, I might take a chance on an older, imported, all-steel one, but wouldn't bother with other versions.
My stupid insomnia is acting up again. This version is called a "Targa". Appearances can certainly be deceiving, but it looks pretty decent.
http://www.gunbroker.com/item/592860749
(It is an old expired auction.)
If I decide that I just "have" to have one of these, this is what I would keep my eyes open for. I looked at old auctions to try to note differences. It seems like maybe the older Italian guns might be the ones with wooden grips. The plastic-looking gripped ones seem cheaper-looking and more likely to have a box that says assembled in the US. Another difference is whether the FIE stamp is on the slide or frame.
Forgive me for rambling.