Career
He is 175 cm tall. Martirosyan was awarded the Honored Master of Sports of Armenia title in 2009. Tigran Martirosyan began weight training in 1995 under the guidance of Vahan Bichakhchyan. He began performing in adult competitions in the light heavyweight division (825 kg) after 2003.
Martirosyan competed at the 2004 Summer Olympics in Athens and came in seventh place with a total of 367.5 kg.
Before the 2007 European Weightlifting Championships in Strasbourg, Martirosyan received a serious injury that would not only not allow him to partake at this event, but also to prepare for the 2007 World Weightlifting Championships in Chiang Mai, where he was only able to come in tenth place. He dedicated his victory to fellow Armenian weightlifter and later weightlifting coach Khachatur Kyapanaktsyan, who died in a car crash a few months earlier.
Martirosyan returned to the Olympics at the 2008 Summer Olympics in Beijing. He lifted 177 kg in the snatch, 203 kg in the clean & jerk and 380 kg in the total.
Martirosyan came behind both Rybakou and Lu Yong, who each totaled the current world record of 394 kg.
Following an unsuccessful performance at the 2010 World Weightlifting Championships, Martirosyan left the Armenian national weightlifting team