partially fluorinated alkenes, such as previously unknown (Z)‐1,2‐(difluorovinyl)ferrocene. Mechanistic studies indicate a titanium(III) hydride as the active species, which forms a titanium(III) fluoride by H/F exchange with the substrate. The HDF step can follow both an insertion/elimination and a σ‐bond metathesis mechanism; the E/Z selectivity is controlled by the substrate. The catalysts’ ineffieciency