Beginning in early 1886, "Stosch" underwent an extensive modernization in preparation for her service as a training ship for naval cadets and later "Schiffsjungen". The ship served in this capacity from 1888 to 1907, during which time her activity consisted primarily of fleet training exercises and overseas training cruises. These cruises frequently went to the West Indies and Mediterranean Sea, though she also made visits to South America and West Africa. "Stosch" also frequently visited foreign ports to show the flag. She also engaged in settling disputes involving foreign governments, including over the murder of a pair of German citizens in Morocco in 1895 and during the Venezuelan crisis of 1902–1903. After being decommissioned in April 1907, she was briefly used as a hulk in Kiel before being sold for scrap in October that year.