Milan stated that he had brought in Mitte on a 6-month loan deal, with a clause permitting him to buy the French midfielder permanently.
Miti will wear No. 18 in his adventure with Milan, which will extend to the end of the current season.
Mette, 26, was born in the French capital Paris to an Ivorian family.
Mete played in Auxerre, Lille, his Belgian club, Monaco and Bordeaux, before moving to Turin in 2018 for 11,5 million euros.
Mete played 94 matches for Turin, scoring 3 goals and making 7 assists.
Mette represented the different age groups of the French youth teams, without appearing with the senior national team, nor did he play for the national team of his country, Côte d’Ivoire.