Jaismine Lamboria became the ninth Indian boxer to be crowned world champion.
Undefeated in his professional career so far the 30-year-old, who trains under former Olympic silver-medallist Roy Jones Jr, dropped down from his previous 75kg weight class to compete for this title on Friday.
Sumit Sangwan became the seventh Indian boxer to qualify for the London Olympics when he beat the 2009 Asian Championship bronze medallist Ihab Almatdault from Jordan 24-12 in the last-four stage of the Asian Qualifiers in Astana, Kazakhstan.