---
title: "Does Ti-6Al-4V titanium alloy float in water? No"
description: "Ti-6Al-4V titanium alloy sinks — its density is 4,430 kg/m³ against water's 1,000. Why density and not weight decides it."
url: https://atoneplace.net/does-it-float/ti-6al-4v/
site: "At One Place"
---

# Does Ti-6Al-4V titanium alloy float?

**Does Ti-6Al-4V titanium alloy float?: No**

4,430 kg/m³ against water's 1,000

Ti-6Al-4V titanium alloy sinks. At 4,430 kg/m³ it is 4.43 times denser than water.

## Why

Floating is decided by density alone — mass divided by volume — compared against the fluid. Weight has nothing to do with it directly: a 200-tonne ship floats and a 2-gram pebble sinks, because the ship encloses enough air to bring its average density below that of water. That is also the only reason a steel hull works.

## The numbers

- **Density:** 4,430 kg/m³
- **Relative to fresh water:** 4.430×
- **Floats in fresh water:** No
- **Floats in seawater:** No

## Compared with other materials

| Material | Density | Floats |
| --- | --- | --- |
| aluminum | 2,700 kg/m³ | No |
| aluminum 6061 | 2,700 kg/m³ | No |
| granite | 2,700 kg/m³ | No |
| marble | 2,700 kg/m³ | No |
| slate | 2,750 kg/m³ | No |
| aluminum 7075 | 2,810 kg/m³ | No |
| silicon carbide | 3,210 kg/m³ | No |
| diamond | 3,515 kg/m³ | No |
| alumina | 3,900 kg/m³ | No |
| Ti-6Al-4V titanium alloy ← | 4,430 kg/m³ | No |

## Common questions

### Does Ti-6Al-4V titanium alloy float in water?

No — at 4,430 kg/m³ it is denser than water's 1,000.

### Does weight decide whether something floats?

No, density does. A 200-tonne ship floats and a small pebble sinks, because the ship encloses enough air to bring its average density below water.

## Related pages

- [Ti-6Al-4V titanium alloy properties](https://atoneplace.net/material/ti-6al-4v/)
- [Does air float?](https://atoneplace.net/does-it-float/air/)
- [Does expanded polystyrene foam float?](https://atoneplace.net/does-it-float/eps-foam/)
- [Does rigid polyurethane foam float?](https://atoneplace.net/does-it-float/polyurethane-foam/)
- [Does EVA foam float?](https://atoneplace.net/does-it-float/eva-foam/)
- [Does balsa float?](https://atoneplace.net/does-it-float/balsa/)
- [Does corrugated cardboard float?](https://atoneplace.net/does-it-float/cardboard/)
- [Does cork float?](https://atoneplace.net/does-it-float/cork/)
- [Does western red cedar float?](https://atoneplace.net/does-it-float/cedar/)

## Sources

- Typical range compiled from manufacturer specifications — At One Place (/about/)