Here are all the new character titles added to the game in Embers of Neltharion on the 10.1 PTR so far.
Zaralek Cavern Racing Completionist: Gold – Obtain gold in all races in Zaralek Cavern.
Title Reward: Zaralek Cavern Racer
The Gift of Cheese – Share the Recipe Rat’s greatest recipe with hungry rats across Azeroth.
Title Reward: Roland
Slow And Steady Wins The Race – Toss treats to a racing snail in Glimmerogg, and have that snail win the race.
Title Reward: Roggy
Obsidian Gladiator: Dragonflight Season 2 – End Dragonflight PvP Season 2 in the top 0.1% of the 3v3 arena ladder (requires 150 games won in Dragonflight Season 2).
Title Reward: Obsidian Gladiator
Obsidian Legend: Dragonflight Season 2 – End Dragonflight PvP Season 2 in the top 0.1% of the Solo Shuffle ladder (requires 50 games won in Dragonflight Season 2).
Title Reward: Obsidian Legend
Pyramid Scheme – Bring Barter Boulders to barter boldly with Ponzo and bring back his hat.
Title Reward: Barter Boss
Dragonflight Keystone Conqueror: Season Two – Attain a Mythic+ Rating of at least 1500 during Dragonflight Season Two.
Title Reward: <PH Title>
<PH> Hero: Dragonflight Season 2 – End Dragonflight Mythic+ Season 2 with a Mythic+ Rating in the top 0.1% of all players in your region.
Title Reward: <PH Hero Title>
Aberrus Mythic and Hall of Fame titles haven’t been implemented yet.