As one representative of ultra-high temperature ceramics (UHTCs), titanium diboride (TiB2) is well-known for its excellent properties, such as super hardness, good thermal conductivity, or chemical stability. Based on these unique features, it is used for diverse bulk and thin film purposes. Although TiB2 thin films have already been thoroughly investigated, there are still unresolved questions regarding stoichiometry's impact and structural imperfections (B-rich tissue phases) on the mechanical properties. For a detailed investigation, we synthesized a stoichiometric variation from TiB2.04 to TiB4.42 by DC magnetron sputtering. We characterized the coatings using a broad set of techniques including SEM, TEM, nanoindentation, and in-situ microcantilever bending experiments to assess the fracture behavior. For achieving super hardness (> 40 GPa), a (0001) orientation is essential, whereas for ("10" "1" ̅"1" ) and (1000) oriented coatings oriented coatings, we observed a linear decrease in hardness down to ≈ 30 GPa. The fracture toughness (KIC) features a tissue phase-dependent behavior with increasing values from 2.51 ± 0.14 MPa√m for TiB4.42 to 3.55 ± 0.16 MPa√m for TiB2.22 due to a decreasing tissue phase width, showing the impact of grain boundary constitution on the fracture properties. In summary, our results highlight the effects of texture and morphological design on PVD grown TiB2+z coatings.