(Usually you get the choice of "Mr, Mrs, Miss or Ms", but they have now added the following titles:
Mx (pronounced "mix" or "mux")
Ind (an abbreviation of individual)
M (unspecified, but a bit James Bond really)
Misc (an abbreviation of miscellaneous)
Mre (an abbreviation for "mystery")
Msr (represents a combination of Miss/Sir)
Myr (unspecified)
Pr (prounced "per". An abbreviation of person)
Sai (pronounced "sigh")
Ser (pronounced "sair")