This standard specifies the ferrous sulfate ammonium Titrimetric method for the determination of chromium content in titanium alloys without vanadium. It is suitable for titanium alloys with a chromium content range of 0.30% to 12.00%. The principle of the method is to dissolve the sample in sulfuric acid, use silver nitrate (AgNO3) as a catalyst, oxidize chromium to a high valent form by ammonium persulfate, and then titrate with a standard solution of ferrous sulfate ammonium to determine the chromium content. The standard includes the necessary reagents and solution preparation methods to ensure the accuracy and Reliability of chromium content determination.