"Wettin"s armament consisted of a main battery of four 24 cm (9.4 in) SK L/40 guns in twin gun turrets, one fore and one aft of the central superstructure. Her secondary armament consisted of eighteen 15 cm (5.9 inch) SK L/40 guns and twelve 8.8 cm (3.45 in) SK L/30 quick-firing guns, all in individual mounts in casemates in the ship's hull and superstructure. The armament suite was rounded out with six torpedo tubes, all submerged in the hull; one was in the bow, another in the stern, and two on each broadside. The ship was protected with Krupp armor plate. In the central portion that protected her magazines and propulsion machinery spaces, her armored belt was thick, tapering to toward the bow and stern. The deck armor was thick. The main battery turrets had of armor plating.