Not known for physical, acrobatic comedy like his contemporaries J. P. Chandrababu and Nagesh, Thangavelu's humour is recognised for his impeccable timing in verbal agility and the characteristic twang of his delivery.

He eventually joined the Rajambal Company troupe, and was taught acting and mentored originally by Yedhartham Ponnuswamy Pillai, and later by M. Kandaswamy Mudaliar.

[1] Thangavelu spent nine years at Rajambal Company, and after Kandaswamy Mudaliar shifted to the film industry, he too did the same, debuting with a minor, uncredited role in Sathi Leelavathi (1936).

Due to lack of success, Thangavelu quit films and survived on alms at a Murugan temple near Kanchipuram until actor M. M. Marappa saw his plight and brought him back into the acting field, this time in theatre.

After a long sabbatical from films, Thangavelu returned to the field in 1951 with Manamagal; director N. S. Krishnan cast him after having already seen and liking his several stage performances.