https://www.hockeygiant.com/product/sher-wood-2013-model-9950-wood-stick-senior/itm/16074-41/

The history of the hockey stick began with an ancient stick made out of hornbeam wood in the mid-1800's.  This stick of course had minimal to zero potential for elastic energy.  Throughout the years however, sticks began to become more effective and powerful.  For example in 1927 the first slight curvature to the blade of a stick made an appearance, and in the 1980's aluminum sticks overtook the classic wood stick.  

Wood sticks: These sticks were first generation of hockey sticks and enabled the player to hit the puck with high kinetic energy in the stick, but minimal consistent elastic energy when compared to next generation hockey sticks.  




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Composite Hockey Sticks:  These sticks are currently used in today's hockey world.  These sticks are light and hollow, which increases the player's ability to create a flex in the stick which increases elastic energy in the stick and therefore creates a larger force on the puck.  Composite sticks are also able to specifically curve their blades which leads to a high gyroscopic effect in the puck after contact.  
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http://www.hockeysticks.co.uk/hockey_stick_materials.htm