Two top panels: spectra of TiO and TiO₂ obtained by combining several lines from the SMA survey (blue line) or PdBI observations (filled gray histogram). They are compared to a combined profile of NaCl emission (third panel) and a strong line of SO₂ (16_0,16  → 15_1,15) from the SMA survey (bottom panel). Spectra were smoothed and the peak flux density of each was normalized to 1.0. The dashed (red) vertical line marks the line center of TiO at V_LSR = 20 km s^-1, and the dotted (green) vertical lines mark 14, 35.5, and 48.0 km s^-1 identified as peaks of velocity components in the SMA combined profile of TiO₂. The outermost dash-dotted lines (cyan) show the full velocity range of the TiO₂ emission.