Comparison · Metals & Alloys
Aluminum vs Titanium
Aluminum and Titanium are easy to confuse because both are metals & alloys. Titanium is harder (Mohs 6) than Aluminum (Mohs 2.75), so Titanium will scratch Aluminum and not the other way round. A copper coin (Mohs 3.5) scratches it, but a fingernail does not. Below is a side-by-side comparison of their properties and the quick tests that separate them.
Key differences between Aluminum and Titanium
- Titanium is harder (Mohs 6) than Aluminum (Mohs 2.75), so Titanium will scratch Aluminum and not the other way round. A copper coin (Mohs 3.5) scratches it, but a fingernail does not.
- Streak color differs: Aluminum leaves a silvery gray streak on unglazed porcelain, Titanium leaves silver-gray.
- Both look metallic, so compare color, tarnish and weight rather than shine.
- Titanium feels noticeably heavier for its size (specific gravity 4.5 versus 2.7 for Aluminum).
Aluminum vs Titanium properties
| Property | Aluminum | Titanium |
|---|---|---|
| Type | Metals & Alloys | Metals & Alloys |
| Mohs hardness | 2.75 | 6 |
| Luster | metallic | metallic |
| Streak | Silvery gray | Silver-gray |
| Transparency | opaque | opaque |
| Specific gravity | 2.7 | 4.5 |
| Crystal system | varies | varies |
| Common colors | Silver, Light gray, Matte gray | Silver, Gray, Dark gray |
| Rarity | common | common |
| Typical specimen value | $1–$80+ | $5–$500+ |
Which is more valuable?
Titanium is usually the more valuable of the two: a typical collector specimen runs about $40 against $10 for Aluminum, and premium Titanium can reach $500 or more.
About Aluminum
Aluminum is a lightweight silvery metal used in cans, foil, tools, frames, cookware, and many everyday objects. It is not usually found as native metal in nature, but it is a common visible material in manufactured scans.
About Titanium
Titanium is a strong, lightweight gray-silver metal used in jewelry, watches, tools, aerospace parts, medical hardware, and performance equipment.
Aluminum vs Titanium FAQ
Is Aluminum the same as Titanium?
No. Both are metals & alloys, but they are distinct species with different hardness, streak or luster. Titanium is harder (Mohs 6) than Aluminum (Mohs 2.75), so Titanium will scratch Aluminum and not the other way round. A copper coin (Mohs 3.5) scratches it, but a fingernail does not.
How can you tell Aluminum from Titanium?
Titanium is harder (Mohs 6) than Aluminum (Mohs 2.75), so Titanium will scratch Aluminum and not the other way round. A copper coin (Mohs 3.5) scratches it, but a fingernail does not. Streak color differs: Aluminum leaves a silvery gray streak on unglazed porcelain, Titanium leaves silver-gray. Both look metallic, so compare color, tarnish and weight rather than shine.
Which is harder, Aluminum or Titanium?
Titanium is harder: Mohs 6 against Mohs 2.75 for Aluminum.
Which is more valuable, Aluminum or Titanium?
Titanium is usually the more valuable of the two: a typical collector specimen runs about $40 against $10 for Aluminum, and premium Titanium can reach $500 or more.
