New titles
A lot of player titles related to the achievements system were added in this build, most of them are linked to Feats of Strength for people getting server firsts.
Quote from Blizzard staff
Achievements Titles
Arena Master - Complete the arena achievements
Salty - Complete the fishing achievements
The Diplomat - Raise your reputation level from unfriendly to exalted with Timbermaw Hold, Sporeggar and the Kurenai / The Mag'har.
The Hallowed - Complete the Hallow's End achievements
The Seeker - Complete 3000 quests.
Feats of Strength
Twilight Vanquisher - Participated in the realm first Sartharion the Onyx Guardian kill (25 player).
The Supreme - First player on the realm to achieve level 80.
Assassin - First rogue on the realm to achieve level 80.
Warbringer - First warrior on the realm to achieve level 80.
Archmage - First mage on the realm to achieve level 80.
Of The Ebon Blade - First death knight on the realm to achieve level 80.
Stalker - First hunter on the realm to achieve level 80.
The Malefic - First warlock on the realm to achieve level 80.
Prophet - First priest on the realm to achieve level 80.
Crusader - First paladin on the realm to achieve level 80.
Arch Druid - First druid on the realm to achieve level 80.
Of the Ten Storms - First shaman on the realm to achieve level 80.
The Magic Seeker - Participated in the realm first Malygos kill (25 player).
Conqueror of Naxxramas - Participated in the realm first Kel'Thuzad kill (25 player).
Of Gnomeregan - First gnome on the realm to achieve level 80.
Of Quel'thalas - First blood elf on the realm to achieve level 80.
Of Argus - First draenei on the realm to achieve level 80.
Of Khaz Modan - First dwarf on the realm to achieve level 80.
The Lion Hearted - First human on the realm to achieve level 80.
Champion of Elune - First night elf on the realm to achieve level 80.
Hero of Orgrimmar - First orc on the realm to achieve level 80.
Plainsrunner - First tauren on the realm to achieve level 80.
Of the Darkspear - First troll on the realm to achieve level 80.
The Forsaken - First forsaken on the realm to achieve level 80.
Grand Master Blacksmith - First player on the realm to achieve 450 skill in blacksmithing.
Grand Master Alchemist - First player on the realm to achieve 450 skill in alchemy.
Iron Chef - First player on the realm to achieve 450 skill in cooking.
Grand Master Enchanter - First player on the realm to achieve 450 skill in enchanting.
Grand Master Engineer - First player on the realm to achieve 450 skill in engineering.
Doctor - First player on the realm to achieve 450 skill in first aid.
Grand Master Angler - First player on the realm to achieve 450 skill in fishing.
Grand Master Herbalist - First player on the realm to achieve 450 skill in herbalism.
Grand Master Scribe - First player on the realm to achieve 450 skill in inscription.
Grand Master Jewelcrafter - First player on the realm to achieve 450 skill in jewelcrafting.
Grand Master Leatherworker - First player on the realm to achieve 450 skill in leatherworking.
Grand Master Miner - First player on the realm to achieve 450 skill in mining.
Grand Master Skinner - First player on the realm to achieve 450 skill in skinning.
Grand Master Tailor - First player on the realm to achieve 450 skill in tailoring.
Hero of Northrend - First player on the realm to gain exalted reputation with the Argent Crusade, Wyrmrest Accord, Kirin Tor and Knights of the Ebon Blade.