Yes, it is easier just playing 300 ranked matches. However, if you need to farm for titles:
Complete each of the missions in story mode, doing this should get you 78 at the least, 100 I believe if you haven't done any other modes yet.
Going through command training with a character unlocks another title so that's 23 (101)
Performing a character's Attack Cliffhanger is another title: 23 (124)
Performing a character's Throw Cliffhanger: 23 (147)
Performing a character's Power Blow: 23 (170)
Performing a character's Power Blow after connecting with a Critical Burst: 23 (193)
Completing all difficulties in Arcade (Solo) awards you a title: 9 (202)
Completing all difficulties in Arcade (Tag) awards you a title: 9 (211)
Completing all difficulties in Time Attack (Solo) awards you a title: 9 (220)
Completing all difficulties in Time Attack (Tag) awards you a title: 9 (229)
Completing all difficulties in Survival awards you a title: 9 (238)
Unlocking all outfits of each character: 23 (262)
From there you have some frivoulous ones you can do such as taunting 10 times total, using a character 1, 10, 50, 100 times, etc. You can use that to buff up the remaining 40 titles.