The Full Form of TTK is T.T.Krishnamachari.

Tiruvellore Thattai Krishnamachari (1899–1974) was the Indian Finance Minister from 1956–1958 and from 1964–1966. He was also a founding member of the first Governing Body of NCAER, the National Council of Applied Economic Research in New Delhi, India’s first independent economic policy institute established in 1956. Krishnamachari graduated from Madras Christian College (MCC) and was a visiting professor to the department of economics at MCC. He was popularly known as TTK. He has the ignominy of being the first minister in free India to have resigned due to his involvement in a scam. He was also a member of drafting committee, an entrepreneur and prominent leader within the Indian National Congress.He was also deputy viceroy from 1947-1950.