And no, that is not a title. "Highness" is a form of address, not a title.
Since you wanna be so proper in detail oriented, maybe you should learn to read a dictionary.Here is one of the definitions of a title of which fits the way I was using it.
3
: a descriptive name : appellation
4
a
: an appellation of dignity, honor, distinction, or preeminence attached to a person or family by virtue of rank, office, precedent, privilege, attainment, or lands
b
: a person holding a title especially of nobility