What “the material” actually is
チタン is sold as grades, not as a single substance. Chemistry Ti (α/β alloys), density 4.51 g/cm³, heat band 1668 °C.
This atlas treats チタン as a system: mill route, coatings, tests and the cavity it sits in.
基本データ
4.51 g/cm³Density
1668 °CMelting
Ti-6Al-4VStar alloy
A1 / powder riskFire
Kroll Mg reductionProcess
metalsFamily
チタン is one of 32 materials in this atlas, grouped under metals: history, structure, measured properties, process routes, uses, safety and market — not a product catalogue.
Scores compare チタン with the rest of the atlas on strength, heat, fire behaviour, insulation, workability and circularity. They are editorial, not certificates.
Seven chapters follow. Fire and insulation claims name test families (Euroclass, ASTM E84, ISO 5660, KS F) rather than inventing a single safety number.
深く読む
Deep dive: チタン
チタン (Ti (α/β alloys)) is a family of grades whose density 4.51 g/cm³, heat band 1668 °C, and fire letter A1 metal.
Heat, fire and insulation
Conductivity note: ~22 W/m·K. Insulation score 14/100 is relative to 32 entries — metals lose, VIPs and aerogels win.
Fire letter in editorial use: A1 metal. Do not equate A1 with “safe in a blaze” or E with “illegal”. Assemblies decide.
How it is made and used
Origin: Kroll process 1940, Luxembourg / US. The process chapter follows feedstock → conversion → forming → finish → install.
Uses span buildings to defence / safety. Pairings matter: steel.
Market and circularity
Producers below are landmarks, not an endorsement ranking. Prices are bands, not live quotes.
Circularity mark 48/100. Ask which scrap, which certificate, which year.
プロファイル
強度
86
耐熱
78
火災性能
80
断熱
14
加工性
42
循環性
48
七つの章
よくある質問
Is チタン non-combustible?
Declared reaction class in this atlas: A1 metal. Assemblies still need resistance tests.
Does チタン insulate?
Thermal mark 14/100 versus the atlas. Conductivity note: ~22 W/m·K.
What is the density band?
4.51 g/cm³
How is it made?
Origin story: Kroll process 1940 (Luxembourg / US).
Can it be recycled?
Circularity mark 48/100 — editorial, route-specific.
Typical melting or failure heat?
1668 °C
What should it be paired with?
steel: Cheaper mass where density is allowed.
Where is it specified?
Buildings, transport, energy and consumer goods — see the uses chapter.
アイコン
Kroll process
Luxembourg · 1940–
Kroll process is a reference point in the public image of チタン.
Ti-6Al-4V
United States · 1952–
Ti-6Al-4V is a reference point in the public image of チタン.
SR-71
United States · 1964–1998
SR-71 is a reference point in the public image of チタン.
Hip implant stem
Global · 1960s–
Hip implant stem is a reference point in the public image of チタン.
Golf club lore
Japan / US · 1990s
Golf club lore is a reference point in the public image of チタン.
Submersible hulls
US / RU · 1960s–
Submersible hulls is a reference point in the public image of チタン.
Bike frames
United States · 1980s–
Bike frames is a reference point in the public image of チタン.
Heat exchanger CP
Global · 1970s–
Heat exchanger CP is a reference point in the public image of チタン.
アイコンのオンオフで、棒が選択内の首位に合わせて再スケールされる。
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対戦
同じ家族、違う点数 — 一戦を選ぶ。
近い素材
六軸で最も近い隣人 — 強度、耐熱、火災、断熱、加工性、循環性。