How to Get FOA titles

You can not get a regular chess title by playing online only. You need to play in physical, rated chess tournaments for that. However, you can get the special online FIDE titles that they call FAO titles. Playing FOA-rated games on the FIDE Online Arena will allow you to earn the FOA Title recognized by FIDE.
👑 Arena Candidate Master (ACM) — Rating 1100; the player must maintain the rating at or above 1100 for 50 games for Rapid time control or 100 games for Blitz or 150 games for Bullet to qualify for the online title.
 👑 Arena FIDE Master (AFM) — Rating 1400; the player must maintain the rating at or above 1400 for 50 games for Rapid time control or 100 games for Blitz or 150 games for Bullet to qualify for the online title.
 👑 Arena International Master (AIM) — Rating 1700; the player must maintain the rating at or above 1700 for 50 games for Rapid time control or 100 games for Blitz or 150 games for Bullet to qualify for the online title.
👑 Arena Grandmaster (AGM) — Rating 2000; the player must maintain the rating at or above 2000 for 50 games for Rapid time control or 100 games for Blitz or 150 games for Bullet to qualify for the online title.
 
You can get these titles on - https://chessarena.com/
They are not free and you need to get membership.