A former police officer, Lutui quickly became a favourite with fans and was later named Warrior-of-the-Year by his teammates after the 2010/11 Championship-winning campaign.
Named in the Tonga squad for the 2007 and 2011 Rugby World Cups in France and New Zealand respectively, Lutui captained his country on the biggest stage of all.
Fans will remember Lutui for his big hits, ball-carrying skills and an early forceful tackle on the final day of the 2006/07 season as Warriors secured their Premiership status with victory over Saracens.
He has gone on to play 186 games for Warriors, scoring 23 tries, and is the club's fourth highest appearance maker of all time.
His final game at Sixways came against Harlequins on Saturday when he replaced Ed Shervington at half-time.
Warriors Rugby Operations Director Corin Palmer said: "We thank Aleki for his efforts and dedication during his time at Worcester Warriors.
"The fact that he has played so many games for this club illustrates just how influential he has been over the years and his professionalism is a credit to rugby.
"Aleki will always be regarded as a club legend here and we wish him every success at Edinburgh."