Titles (DN)  

Dragon Nest Wikibase™ Dictionary

Titles are earned by completing Achievements. Some titles are purely cosmetic and let other players know of your progression through the world. Others actually add bonuses. Because of this you can have two titles at any time, one is your Display Title and the other is for Attributes.

See DNArmory for a list of all the Titles you can earn. Many will have posted comments by players that tell you how to get them.