Transition frequencies, isotope shifts, and hyperfine structure in $4s → 4p$ transitions of Ti$^+$ ions

We have measured transition frequencies, isotope shifts and hyperfine structure splittings in the 3 d²( 3\!F) 4 s\, ⁴ FJ→ 3 d²( 3\! F) 4 p \,⁴ GJ+1 transitions in Ti⁺ ions for J=3/2,\, 5/2,\, 7/2 using collinear laser spectroscopy. Ions were generated by laser ablation in a buffer gas atmosphere and extracted into vacuum through a nozzle and a pair of radiofrequency (RF) funnels. The obtained results are of interest as reference values for on-line measurements of short-lived titanium isotopes and for astrophysical searches for temporal or spatial variations of the fine structure constant α using quasar absorption spectra.