ESMA and ESR investigations were made in clearing up the manner of Chromium insertion into texture components - especially into glass phase - of fused-cast alumina-zirconia materials. It is showed that main part of Chromium exists trivalently in crysatlline phase. With oxidation number zero Chromium is main component of a metal phase with little size during in glass phase were found only a bivalent Chromium. A Titanium oxide addition takes effect favourably on reduction of Chromium content in glass phase.