Tito Ortiz -- Charged with DUI ... Stemming from Porsche Crash

Former MMA champ Tito Ortiz has been charged with two counts of DUI ... after crashing his Porsche into a concrete median back in January, TMZ Sports has learned.

The 38-year-old fighter was arrested on January 6th ... when cops say he blew a .12 on the breathalyzer, following the 4am crash on an L.A. freeway.

As we previously reported, Ortiz had been partying at the Playboy Mansion in the hours before the incident.

If convicted, Ortiz faces up to 6 months in jail and a $1,000 fine -- but since it's his first offense, he probably won't do any time. Instead, he'll likely only be sentenced to probation and will be required to complete an alcohol education course.