Glazing comprising a substrate coated with a stack comprising a functional layer based on silver and a thick blocking underlayer TiOx

The invention relates to a glazing comprising a transparent substrate coated with a stack of thin layers comprising at least one metallic functional layer based on silver, at least two antireflection coatings each antireflection coating comprising at least one dielectric layer, so that that each metallic functional layer is placed between two antireflection coatings. The stack comprises at least one anti-reflective coating comprising a dielectric layer capable of generating hole type defects and at least one titanium oxide-based barrier layer having a thickness greater than 1 nm, the barrier layer is located between the anti-reflective coating comprising a dielectric layer capable of generating hole type defects and a metallic functional layer based on silver, immediately in contact with the metallic functional layer based on silver.