Four-time World champion M C Mary Kom staved off stiff resistance from local pugilist Hoa Nguyen Thi to win the 46 kg title as India won two gold medals and as many silver in women's boxing of the third Asian Indoor Games in Hanoi on Wednesday. Kavita Goyat (64kg) won the second gold for India while L Sarita Devi (54 kg) and N Usha (57kg) bagged a silver each.