  We report on calculations of energy levels, radiative rates, oscillator
strengths, and line strengths for transitions among the lowest 253 levels of
the (1s$^2$2s$^2$2p$^6$) 3s$^2$3p$^5$, 3s3p$^6$, 3s$^2$3p$^4$3d, 3s3p$^5$3d,
3s$^2$3p$^33d^2$, 3s$^2$3p$^4$4s, 3s$^2$3p$^4$4p and 3s$^2$3p$^4$4d
configurations of Ti VI. The general-purpose relativistic atomic structure
package ({\sc grasp}) and flexible atomic code ({\sc fac}) are adopted for the
calculations. Radiative rates, oscillator strengths and line strengths are
reported for all electric dipole (E1), magnetic dipole (M1), electric
quadrupole (E2) and magnetic quadrupole (M2) transitions among the 253 levels,
although calculations have been performed for a much larger number of levels.
Comparisons are made with existing available results and the accuracy of the
data is assessed. Additionally, lifetimes for all 253 levels are listed,
although comparisons with other theoretical results are limited to only 88
levels. Our energy levels are estimated to be accurate to better than 1%
(within 0.03 Ryd), whereas results for other parameters are probably accurate
to better than 20%. A reassessment of the energy level data on the NIST website
for Ti VI is suggested.
