Clash of Avatars titles and how to obtain them:

Spring Cleaner           S mastery of clearing Polluted Swamp
Wolf Killer                 S mastery of Werewolf Range
Dawn Light               S mastery of City of Dead
Snow Messenger       S mastery of Orc Desert
Fly to Sky                 S mastery of The Horizon
King of World            World Boss No. 1 in damage rank
Four knights              World Boss No. 2-5
The Elite                  World Boss No. 6-10
Light of Athena         World Quiz No. 1 in rank

The Wise                 World Quiz No. 2-10

Champion                 Arena No. 1 in rank
The Strong              Arena No. 2-10
Challenger                Asura ground killed 30 times
Competitor               Asura ground killed 200 times
Gladiator                  Asura ground kill 30 enemies
Asura                      Asura ground kill 200 enemies
Demon Hunter          Defeat Guild Boss – all participants
Twilight Lord            Winner in Twilight War
Pilgrim                     Unlock Pumpkinator
Sky Controller           Unlock Sleepy Bird
Kungfu Master          Unlock Rat Lee
Pet Trainer               Unlock 3 pets
Pet Collector            Unlock 9 pets
Fun Boy                   Use Fun Boy (Not implemented yet)

Aviator                    Use Aviator (Not implemented yet)

Knight                     Vip1
Baronet                   Vip2
Baron                      Vip3
Viscount                  Vip4
Earl                         Vip5
Marquess                 Vip6
Duke                       Vip7
Royal Duke               Vip8
Lord                        Vip9

King                        Vip10

No.1 Guild               No.1 guild in guild rank
Over Lord                No. 1 in BR rank
Zodiac Master          No. 1 in Zodiac rank
Sky Walker              No. 2-10 in Zodiac rank
Battle Master           No. 2-10 in Asura ground rank
King of Assassin        No. 1 in Asura ground rank
Ten Lords               No. 2-10 in BR rank

Legendary Hero       Claim Vip4 privilege

Star Tycoon            Use Star Tycoon (Not implemented yet)
Rare Elite                Use item Rare Elite (Not implemented yet)
Justice Dawn           Unlocked from 2nd day log in chest
Holy Relic                Unlocked from 7th day log in chest

Bling Bling               Reward from recharge event

Archangel               No. 1 in Wings BR rank

Free Rain                No. 1 in Mount BR rank
Genie Wiz               No. 1 in Pet BR rank
Seraphim               Top 10 in Wings BR rank
Brave Ranger          Top 10 in Mounts BR rank
Master Trainer        Top 10 in Pet BR rank
Rare Coser             Use Rare Coser card, gained from event