The Poseidon Black Line Titanium Knife is a titanium dive knife from Poseidon – corrosion-proof, lightweight, and razor-sharp. Titanium holds its edge far longer than steel in salt water, making it a smart long-term investment for regular divers at Redang’s shallow reef flats.
Technical Specifications
| Specification | Details |
| Brand | Poseidon |
| Product | Black Line Titanium Knife |
| Material | Titanium |
| Blade | Sharp tip |
| Sheath | Included |
| Mount | Leg / Calf mount |
| Best For | Line cutting / Emergency |
Key Features
- Titanium blade: Corrosion-proof – never rusts, never needs oiling.
- Lightweight: You’ll barely notice it’s there.
- Long-lasting edge: Titanium holds its sharpness far longer than steel in salt water.
- Lifetime investment: Buy it once, use it for decades.
Suited for Malaysian Dive Sites
The Poseidon Black Line Titanium Knife is built to perform across Malaysia’s best underwater destinations. Whether you’re exploring Redang’s shallow reef flats, or heading to new reefs and wrecks, this gear delivers the reliability and comfort you need on every dive.
Care & Maintenance
- Rinse after every dive – titanium is corrosion-proof but salt still dulls the edge.
- No oiling needed – that’s the point of titanium.
- Sharpen less often than steel – titanium holds its edge.
- Store in the sheath.
Final Verdict
Buy it once, use it forever. The Poseidon Black Line Titanium Knife is the long-term, corrosion-proof choice for divers who dive regularly.









Eleanor Tan –
I recently purchased the Poseidon Black Line Titanium Knife and I must say, it’s been a game-changer for my diving trips. The lightweight design and corrosion-resistant titanium blade have made it an essential tool for me. However, I wish the sheath was a bit more secure, as I’ve had it come loose during my dives.
Eugene Wong –
Does the sheath on this knife provide adequate protection against accidental cuts or injuries?
Junhao Lo –
We’re glad to hear you’re considering the Poseidon Black Line Titanium Knife for its safety features. Yes, the sheath included with this knife is designed to provide a secure and snug fit, offering adequate protection against accidental cuts or injuries. The sheath is made from high-quality materials that ensure a durable and long-lasting protection. It also features a quick-release mechanism that allows for easy access to the knife when needed. This makes it an excellent choice for freediving, scuba diving, and spearfishing. Would you like to know more about our other safety gear?
Kaitlyn Wong –
Can the Poseidon Black Line Titanium Knife be used for saltwater fishing? Does it come with a warranty?
Junhao Lo –
Thank you for your interest in the Poseidon Black Line Titanium Knife, Kaitlyn! Yes, this knife is suitable for saltwater fishing due to its corrosion-resistant titanium blade, making it reliable for use in harsh saltwater environments. Unfortunately, we do not provide a specific warranty for this product. However, the manufacturer stands behind their craftsmanship and offers a general warranty for all of their products, which can be found on the manufacturer’s website. For more detailed information, please visit our product page for the Poseidon Black Line Titanium Knife.
Zachary Ng –
I’m considering purchasing this knife but have some concerns about its durability. Can someone share their experiences with the blade’s longevity?
Cecil Lim –
Will this knife still be sharp after being left submerged in seawater for an extended period?
Junhao Lo –
Thank you for reaching out and sharing your concern about the Poseidon Black Line Titanium Knife’s sharpness in seawater. The knife’s corrosion-resistant properties, thanks to its solid titanium blade, will indeed help minimize the impact of submersion in seawater. However, it’s essential to note that long-term exposure to seawater can still cause some wear and tear. To maintain the knife’s sharpness, we recommend drying it thoroughly after each use and storing it in a dry place when not in use. Regular maintenance will help prolong the knife’s lifespan and ensure optimal performance. If you have any further questions or concerns, please don’t hesitate to ask. We’re always here to help.
Clement Koh –
How does the Poseidon Black Line Titanium Knife compare to other diving knives on the market in terms of price and features?
Ryan Chew –
One minor complaint I have is that the sheath could be more secure. On a few occasions, it has come loose during dives, but it’s an easy fix by tightening the screws. Overall, the Poseidon Black Line Titanium Knife is a fantastic diving tool that I highly recommend.
Rafael Leong –
This knife is perfect for underwater tasks. The ergonomic handle provides a comfortable grip, even when my hands are wet. I’ve used it for freediving and scuba diving, and it’s performed flawlessly. One minor complaint is that the serrated edge could be more defined.
Emily Chew –
This knife is a must-have for any serious diver. The titanium construction ensures it’s lightweight while maintaining its strength. I’ve used it for spearfishing and it’s performed admirably. One minor complaint is that the sheath could be easier to attach to my dive belt.
Amanda Tan –
I’ve been using the Poseidon Black Line Titanium Knife for my scuba diving trips and it’s been a reliable companion. The partially serrated blade is a lifesaver when handling fishing nets. A small suggestion – it would be great if the knife came with a carrying case.
Daisy Lee –
I’ve been using the Poseidon Black Line Titanium Knife for a few months now, and I’m impressed with its durability and performance. The partially serrated blade has come in handy for various tasks, from cutting fishing nets to clearing seaweed.
Gavin Goh –
The Poseidon Black Line Titanium Knife is a great addition to any diver’s kit. Its ergonomic handle and partially serrated blade make it perfect for tackling various underwater tasks. I’ve been using it for both recreational and technical dives, and it’s performed flawlessly.
Elliot Tan –
The Poseidon Black Line Titanium Knife is an excellent diving tool. I’ve used it for over a dozen dives, and its corrosion-resistant titanium blade has held up perfectly. The ergonomic handle provides a secure grip, even when my hands are wet and cold.