ISSUE 037  ·  MATERIALS, CAPACITY, CONVERSION
Everyone is counting shells. European output targets, American production rates, the months-long backlog at Scranton. Titanium sponge sits one layer deeper: the first metallic form of titanium, and the feedstock for everything made from it.
Sponge is the porous grey metal produced when titanium tetrachloride is reduced in a Kroll process furnace. The majority of US titanium metal consumption goes to aerospace, according to the USGS, with the remainder serving armor, chemical processing, marine hardware, medical implants, and power generation. Fighter airframes, jet engine compressor disks, and submarine hull sections all start with sponge.
The United States produced zero commercial titanium sponge in 2025, according to the USGS Mineral Commodity Summaries published February 2026. Imports totalled approximately 44,000 tonnes: through July, Japan supplied 73 percent, Kazakhstan 13 percent, Saudi Arabia 13 percent. Japan mines no titanium ore. The Department of Commerce transmitted its Section 232 report to the President on November 29, 2019, concluding that titanium sponge imports threaten to impair national security; on February 27, 2020, the President concurred and accepted Commerce’s recommendation not to adjust imports.
0 tonnes
US commercial titanium sponge production in 2025.
USGS MINERAL COMMODITY SUMMARIES, FEBRUARY 2026

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PLATE  ·  JAPANESE STEELWORKS, CONTINUOUS CASTING LINE, 1980S
In the 1970s and 1980s, Japan built a commanding lead in world steel through capital investment at a pace its competitors chose not to match. During the thirteen years ending in 1984, Japanese steelmakers added roughly 90 million net tons of continuous casting capacity while the United States added approximately 30 million, according to the IMF’s Finance and Development in December 1987.
Japan achieved that position while importing virtually all its iron ore and coking coal. The competitive advantage was in the process itself: the furnace technology, the continuous casting lines, the quality certification systems, the workforce.
The pattern now holds in titanium sponge: Japan mines no titanium ore. It imports rutile and titanium slag from countries including South Africa, Canada, and Australia, processes them through Osaka Titanium Technologies and Toho Titanium, and supplies 73 percent of US sponge imports through July 2025. Both producers hold aerospace quality certifications accepted by Boeing and Airbus.
PLATE  ·  OSAKA TITANIUM TECHNOLOGIES, AMAGASAKI, JAPAN
On September 2, 2024, Osaka Titanium Technologies announced an expansion of sponge capacity at its Amagasaki plant, investing approximately ¥33 billion. On March 13, 2026, OTC revised the investment to approximately ¥39 billion, citing rising construction material and labor costs. The expansion adds roughly 10,000 tonnes per year to OTC’s existing 40,000-tonne annual capacity, with completion targeted within fiscal 2027.
The Japanese government supported the project with a grant of up to approximately ¥8.04 billion announced by METI in August 2024.
The last large-scale American titanium sponge plant, TIMET’s Henderson, Nevada facility, had an estimated annual capacity of 12,600 tonnes per year according to the USGS. It was idled in July 2020. TIMET is a subsidiary of Precision Castparts Corp., which has been a wholly owned subsidiary of Berkshire Hathaway since January 2016.
44,000 t
US titanium sponge imports, 2025
73%
Share of imports from Japan, through July 2025
12,600 t/yr
Last US sponge plant capacity, idled 2020
 
Every supply figure carries a date and a source in the text. Not a footnote. In the sentence.
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