The top-seeded Errani bested No. 2 Suarez Navarro 6-0, 6-4 in the 1-hour, 35-minute contest, taking advantage of four double faults en route to the clay-court win.
It was the seventh career title and first of the year for the eighth-ranked Italian, who was coming off a second-place finish in last week's event at Dubai.
Navarro, meanwhile, fell in her first title match appearance this season.
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