Taiwanese President Tsai Ing-wen vowed that the island would not 'concede one step' in defending itself as she inaugurated two frigates bought from the United States aimed at boosting Taipei's naval capabilities against China.
Rival China has upped military drills including a live fire exercise in the Taiwan Strait in April, declaring its willingness to confront the island's "independence forces".
Beijing still claims self-ruled Taiwan as part of its territory awaiting reunification, by force if necessary, even though the two sides have been ruled separately since 1949 after a civil war.
China has also been incensed by recent warming ties between Washington and Taipei, including the U.S State Department's approval of a preliminary licence to sell submarine technology to the island.
The two Perry-class guided missile frigates were officially commissioned in a ceremony at Zuoying base in southern Kaohsiung city.