Titanium — history, structure, properties & uses

Quick facts

4.51 g/cm³Density

1668 °CMelting

Ti-6Al-4VStar alloy

A1 / powder riskFire

Kroll Mg reductionProcess

metalsFamily

Titanium 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 Titanium 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.

Deep introduction

Deep dive: Titanium

Titanium (Ti (α/β alloys)) is a family of grades whose density 4.51 g/cm³, heat band 1668 °C, and fire letter A1 metal.

What “the material” actually is

Titanium 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 Titanium as a system: mill route, coatings, tests and the cavity it sits in.

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.

The profile

Strength 86

Heat resistance 78

Fire performance 80

Insulation 14

Workability 42

Circularity 48

Seven chapters

Origins & milestones

From Kroll process 1940 to present: timeline, eras and three turning points for Titanium.

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Structure & grades

Chemistry Ti (α/β alloys), microstructure, grades and bonding for Titanium.

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Measured properties

Strength, heat, electrical behaviour and fire notes for Titanium, with named test families.

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How it is made

Process steps, industrial routes, diagrams and hard limits for Titanium.

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Uses & pairings

Sectors, emblematic products and materials commonly specified with Titanium.

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Safety & fire class

Hazards, fire-class language, environment and handling notes for Titanium.

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Market & cost

Cost bands, producing regions, stats and landmark producers for Titanium.

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Frequently asked questions

Is Titanium non-combustible?

Declared reaction class in this atlas: A1 metal. Assemblies still need resistance tests.

Does Titanium 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.

Icons

Kroll process

Luxembourg · 1940–

Kroll process is a reference point in the public image of Titanium.

Ti-6Al-4V

United States · 1952–

Ti-6Al-4V is a reference point in the public image of Titanium.

SR-71

United States · 1964–1998

SR-71 is a reference point in the public image of Titanium.

Hip implant stem

Global · 1960s–

Hip implant stem is a reference point in the public image of Titanium.

Golf club lore

Japan / US · 1990s

Golf club lore is a reference point in the public image of Titanium.

Submersible hulls

US / RU · 1960s–

Submersible hulls is a reference point in the public image of Titanium.

Bike frames

United States · 1980s–

Bike frames is a reference point in the public image of Titanium.

Heat exchanger CP

Global · 1970s–

Heat exchanger CP is a reference point in the public image of Titanium.

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Head-to-head

Same family or rival physics — pick a duel.

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Titanium vs Aluminium

Head to head →

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Titanium vs Nitinol

Head to head →

Similar materials

Closest neighbours on the six atlas axes — strength, heat, fire, insulation, workability and circularity.

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✈️Titanium

Quick facts