[1] The third and last child of mathematician Gheorghe Țițeica, he was born in Bucharest, where he attended Mihai Viteazul High School.

That year, he met Enrico Fermi, who gave three talks at his alma mater; upon Fermi's recommendation, he pursued his studies at Leipzig University from 1930 to 1934 under Werner Heisenberg, earning a doctorate in 1935, with thesis "On the behaviour of electrical resistance of metals in magnetic field".

He became a titular member of the Romanian Academy in 1955, and served as its vice president from 1963 until his death in his native city.

He was also the Vice-Director of the Joint Institute for Nuclear Research in Dubna (1962–1964), and a member of the Council of the European Physical Society (1970–1975).

[2] In 1971 he was awarded the Order of the Star of the Romanian Socialist Republic, 2rd class.