The Spanish champions have long been linked with the 22-year-old, who has scored 17 times in 38 appearances for Antonio Conte's side during the 2019-20 campaign.
According to ESPN, Barca have now come to an agreement with Martinez over personal terms, although the Catalan giants are yet to strike a deal with Inter when it comes to a transfer fee.
The former Liverpool playmaker has allegedly been made surplus to requirements by the La Liga giants, and a number of clubs have been linked with a move ahead of the 2020-21 season.
Martinez is thought to have a €111m (£99.3m) release clause in his contract at San Siro although various reports have claimed that the buy-out figure has now expired. body check tags ::