Not quite true...
For example:
Crossroads: A movie about a young Blues guitarist with classical training who ends up playing against the Devil in a guitar face-off.
Crossroads: A pathetic Britney Speares movie with no real discernable plot.
On the other hand, if the title includes any copyrighted character names, then yes, it's protected by copyright. For example, Godzilla and Shaft.
Or if any other intellectual property is included in the title - like, well, Gundam or Macross.