Arthur Davtyan debuted on adult competition in 2011, at the individual 2011 European Artistic Gymnastics Championships that were held in Berlin, where he participated in all disciplines. Championship for the Armenian sportsman emerged successful. Being the youngest member of the all-around, Davtyan took 20th place. In other disciplines, Davtyan could not overcome the qualifying threshold. Of all the exercises, his best result was 14th place in the vault.