Unseeded Sowjanya, who had also knocked out national champion Riya Bhatia in the quarterfinals, beat Mihika 7-5 6-2 in the summit clash of the USD 10,000 hard court event.
Sowjanya's first title had come in 2013 in Sharm El Sheikh while she won her second singles trophy in Aurangabad in 2014 on clay.
The 16-year-old unranked Mihika had better ground strokes but Sowjanya played smartly by using her height advantage. She made it tough for Mihika by playing many shots that went above the head of diminutive Mihika.
The young Maharashtra player paid the price for making too many unforced errors today.
More From This Section
Sowjanya, who hails from Hyderabad, broke Mihika in the sixth game but lost her own in the next. It was 5-5 after another exchange of break made it 5-5.
Sowjanya broke her rival one more time in the 12th to take lead.
Struggling with her first serve, Mihika dropped serve in sicth game at love to hand Sowjanya the advantage.
"I had come here without expectations. I hardly had a one and a half week practice since I got injured at an ATT event in Delhi, where I twisted my ankle. I wasn't expecting much," 23-year-old Sowjanya said after the match.
Asked why she is not getting results consistently, Sowjanya said lack of infrastructure in her state and good training is the reason.
"It takes 45 minutes to reach the gym from tennis courts in my place and 90 minutes to swimming pool. Also I am injury prone," she said.