An
X-Title is one of any of the numerous
X-Men related titles published by
Marvel Comics. Just some of these are;
X-Men,
Uncanny X-Men,
Wolverine,
Gambit,
Bishop, Gambit And Bishop,
X-Factor,
X-Force,
Generation X, Classic X-Men, X-Men ; The Hidden Years, X-Men; The Early Years, The
New Mutants,
Dazzler,
X-Statix,
Cable,
Deadpool,
Ultimate X-Men, Essential X-Men, Soldier X, X-Men Unlimited,
Excalibur, Mutant X, X-Man, The Brotherhood, Agent X, X-Men 2099,
Weapon X, X-Men; The Hidden Years...
Marvel has for years recieved a lot of deserved criticism as there always seems to be too many X-Men related titles for all of them to be quality comics or at all relevant. While most of the above were cancelled because they were poor comics X-Titles tend to stick around longer than they need to purely because they are X-Titles.
A recent development shows that maybe Marvel has smartened up. There was a cull of (mainly) superfluous X-titles in 2001 - although new junk replaced old junk on more than one occasion - and so far two long running titles of erratic quality have been axed in 2003.