tickThickness: Number

Sets the thickness of the Tick Marks in pixels.

Default: 2
Example: 2, 4..

var  chart =  new  CanvasJS.Chart("container",
   tickThickness: 5,

Try it Yourself by Editing the Code below.

  Also See:    

In order to provide better support,we have closed the comments and switched completely to our Forums.
If you have any questions, please feel free to ask in our forums.