Titanium or carbon

Jasper Janssen wrote in message . ..
On 11 Jun 2003 17:32:42 -0700, (Chalo) wrote:

Since both of those frame materials are offered because they are
exotic (and not because of any significant superiority compared to
quality steel or aluminum), then the better one is the one that turns
you on more. That's the only noticeable advantage either material
possesses over the cheaper alternatives anyway.

Ti has the big advantage of not needing paint and thus looking great.

Jasper


The other big advantage to Ti over carbon is the metallic 'ping' sound
that the cable spacers make when you go over a bump in the road. I
love that. Probably just me.

Tim Axtelle wrote:

Jasper Janssen wrote in message . ..
On 11 Jun 2003 17:32:42 -0700, (Chalo) wrote:

Since both of those frame materials are offered because they are
exotic (and not because of any significant superiority compared to
quality steel or aluminum), then the better one is the one that turns
you on more. That's the only noticeable advantage either material
possesses over the cheaper alternatives anyway.

Ti has the big advantage of not needing paint and thus looking great.

Jasper

The other big advantage to Ti over carbon is the metallic 'ping' sound
that the cable spacers make when you go over a bump in the road. I
love that. Probably just me.

Ti has nearly the same ductility as steel. Carbon snaps.

Dr. Rev. Chuck, M.D. P.A. wrote:

Ti has nearly the same ductility as steel. Carbon snaps.

That depends on temperature. When I was caving in England, using Single
Rope Technique, I was warned against using titanium carabines in my
equipment. There had actually been accidents because they can suddenly
shatter at the low temperatures in caves (about 4 degrees C). We always
used aluminium crabs to hang our lives on.

In article , Dr Engelbert Buxbaum
wrote:

Dr. Rev. Chuck, M.D. P.A. wrote:

Ti has nearly the same ductility as steel. Carbon snaps.

That depends on temperature. When I was caving in England, using Single
Rope Technique, I was warned against using titanium carabines in my
equipment. There had actually been accidents because they can suddenly
shatter at the low temperatures in caves (about 4 degrees C). We always
used aluminium crabs to hang our lives on.

If titanium cracks at 4 degrees C, why aren't the jet engine fans
exploding off of more airplanes? They see air a lot colder than that.

In article , says...
In article , Dr Engelbert Buxbaum
wrote:

Dr. Rev. Chuck, M.D. P.A. wrote:

Ti has nearly the same ductility as steel. Carbon snaps.

That depends on temperature. When I was caving in England, using Single
Rope Technique, I was warned against using titanium carabines in my
equipment. There had actually been accidents because they can suddenly
shatter at the low temperatures in caves (about 4 degrees C). We always
used aluminium crabs to hang our lives on.

If titanium cracks at 4 degrees C, why aren't the jet engine fans
exploding off of more airplanes? They see air a lot colder than that.

Different alloys different heat treatments, because of different design
criteria.



--
Dave Kerber
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David Kerber wrote:

In article , says...
In article , Dr Engelbert Buxbaum
wrote:

Dr. Rev. Chuck, M.D. P.A. wrote:

Ti has nearly the same ductility as steel. Carbon snaps.

That depends on temperature. When I was caving in England, using Single
Rope Technique, I was warned against using titanium carabines in my
equipment. There had actually been accidents because they can suddenly
shatter at the low temperatures in caves (about 4 degrees C). We always
used aluminium crabs to hang our lives on.

If titanium cracks at 4 degrees C, why aren't the jet engine fans
exploding off of more airplanes? They see air a lot colder than that.

Different alloys different heat treatments, because of different design
criteria.


What you say has merit, but mountaineering gear - life and death equipment at
that - that gets brittle enough to break in the cold? How likely is that?
They must have a very clear warning on them somewhere. Didn't notice any
of those the last time I was at MEC.

Bernie