The fight, which took place in Moscow, lasted all 10 rounds.
The judges unanimously gave the victory to 25-year-old Oganesyan, for whom she became the fifth in the professional ring, in the absence of defeats.
For 40-year-old Troyanovsky, this defeat was the third in his career with 29 victories.
Earlier, White's promoter spoke about a possible third fight with Povetkin.