Department of Chemistry, Jadavpur University, Calcutta-700032 Manuscript received 28 August 1976, revised 18 February, 1977, accepted 18 February 1977 N-cinnamoyl phenyl hydroxylamine reacts with titanium to form the yellow coloured complexes with metal to ligand ratios 1 : 1 in the acidity range extending from pH 0.5 to 2.5N, 1 : 2 and 1 : 3 (metal : ligand) in the acidity ranges of 3-5N and 7-5-9N HCl res­pectively. All the complexes were extractable into chloroform. The composition of the complexes were established by Job's and molar ratio methods. The stepwise and overall for­mation constants of all the complexes were determined by extended Yatsimirskii's, Leden's and Harvey Manning's method. For the evaluation of formation constants of 1 : 3 system following Yatsimirskii's method, a computer (IBM 1130) was deployed using FORTRAN Programming. An extractive spectrophotometric method of determination of trace amount of titanium in presence of diverse ions has also been described.