A magnet will help rule out steel. Alloy welds will typically be beefier.
What you are looking for is a dull....grey.....well.....Ti colour :?
It may be simpler to pop the stem and forks off and look down the head-tube since they are usually clean inside.
If there is no rust on the frame, or oxidisation (especially in the BB shell were moisture gathers) for a bike of this age and general condition you can consider it Ti. If the frame weighs around the 1.5 Kg mark, that is another strong indicator.
What you are looking for is a dull....grey.....well.....Ti colour :?
It may be simpler to pop the stem and forks off and look down the head-tube since they are usually clean inside.
If there is no rust on the frame, or oxidisation (especially in the BB shell were moisture gathers) for a bike of this age and general condition you can consider it Ti. If the frame weighs around the 1.5 Kg mark, that is another strong indicator.