Despite the northern club's failing to hit the net, and finding themselves under the pressure at the other end, Christian Abbiati and Alessandro Nesta helped to keep the capital side out and stretch the Rossoneri's lead at the top to nine points.
Milan knew that a point would be enough to secure the Scudetto, as even if Inter win their three remaining matches they can only match Milan's current total of 78; and having lost both the city derbies their head-to-head record renders them unable to lift the title without a points advantage.
Milan have led the table since late-November without being overhauled, though their lead was cut to two points at the end of March as Inter enjoyed a simultaneous resurgence.
AC Milan - Scudetto Victories
1901, 1906, 1907, 1950–51, 1954–55, 1956–57, 1958–59, 1961–62, 1967–68, 1978–79, 1987–88, 1991–92, 1992–93, 1993–94, 1995–96, 1998–99, 2003–04, 2010–11
However, the Rossoneri then embarked upon a six-match unbeaten run, starting with a stunning 3-0 derby win and culminating in this evening's result.
The title is the Diavolo's first since 2004, when they finished 11 points ahead of tonight's opponents Roma under coach Carlo Ancelotti, and comes in Allegri's first season on the bench.
The San Siro club have now won eight Scudetti during the reign of Italian prime minister Silvio Berlusconi as the club's president. Berlusconi recently celebrated 25 years at the helm of the club and has also won five European titles in his time in Via Turati.