- I have the Gladiator mount but not the title
- I have the achievement but not the title
- I just noticed that I'm missing the title from the previous arena season
Arena titles are granted immediately as soon as you reach the necessary rating and once earned, the title lasts until the end of the current season. You can keep track of the titles you had in the past by looking at your Feats of Strength.
Rated Battleground titles are permanent.
PvP titles are not account wide and can only be used by the character that earned the title. This includes the Gladiator title: even if the Gladiator mount is account-wide, the title is not.
Only the unique [Season] Gladiator title (also known as Rank One) is permanent. The Gladiator title you earn at the 0.5% is temporary. For example, you could have earned Gladiator: Warlords Season 1 for being at the 0.5% of the arena ladder, but not Primal Gladiator: Warlords Season 1 for being at the top 0.1%. Only the latter awards the permanent title.
BURNING CRUSADE CLASSIC
Arena titles are granted at the end of the season and can only be used for the duration of the next season.
For example, if you qualified for Duelist in Season 1, your character will earn the title at the beginning of Season 2 and you can display the title for the duration of Season 2. Then the title is removed from your character as soon as Season 3 starts.